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    346 Products

    Machine Key Stock

    Cut this square or rectangular key stock to length to create a straight machine key. Straight keys are the most common type of key. Machine keys are often the same material as the shaft and other components with which they are used. To use a key as a sacrificial part, choose a softer key that will shear off when parts are exposed to excessive force, preventing damage to expensive equipment.
    18-8 Stainless Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    18-8 stainless steel key stock offers a balance of strength and corrosion resistance. It may be mildly magnetic. 18-8 stainless steel key stock is more corrosion resistant than steel key stock.
    Oversized Tolerance—Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. Press it into place for use in high-torque applications or to replace a key in a worn keyway.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    DIN 6880—Key stock that meets DIN 6880 conforms to DIN standards for undersized keys.
    Tolerance
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Each
    12" Long
    1/8" × 1/8"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—00000000000000
    1/8" × 1/8"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—0000000000000
    5/32" × 5/32"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—0000000000000
    5/32" × 5/32"Standard-0.002" to 0.001"-0.002" to 0.001"Rockwell B82—0000000000000
    3/16" × 3/16"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—0000000000000
    3/16" × 3/16"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—0000000000000
    3/16" × 1/4"Standard-0.002" to 0.002"-0.005" to 0.005"Rockwell B82—0000000000000
    3/16" × 1/2"Standard-0.008" to 0.008"-0.015" to 0.015"Rockwell B80—00000000000000
    1/4" × 1/4"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—0000000000000
    1/4" × 1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—0000000000000
    1/4" × 1/2"Standard-0.008" to 0.008"-0.015" to 0.015"Rockwell B80—00000000000000
    5/16" × 5/16"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—0000000000000
    5/16" × 5/16"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B82—0000000000000
    3/8" × 3/8"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—00000000000000
    3/8" × 3/8"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B82—00000000000000
    3/8" × 1/2"Standard-0.008" to 0.008"-0.015" to 0.015"Rockwell B80—00000000000000
    3/8" × 3/4"Standard-0.008" to 0.008"-0.015" to 0.015"Rockwell B80—00000000000000
    7/16" × 7/16"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—00000000000000
    7/16" × 7/16"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B82—00000000000000
    1/2" × 1/2"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—00000000000000
    1/2" × 1/2"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B82—00000000000000
    1/2" × 3/4"Standard-0.008" to 0.008"-0.015" to 0.015"Rockwell B80—00000000000000
    9/16" × 9/16"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—00000000000000
    9/16" × 9/16"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B82—00000000000000
    5/8" × 5/8"Oversized0.000" to 0.005"0.000" to 0.005"Rockwell B82—00000000000000
    5/8" × 5/8"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B82—00000000000000
    5/8" × 3/4"Standard-0.015" to 0.015"-0.015" to 0.015"Rockwell B80—00000000000000
    5/8" × 1"Standard-0.015" to 0.015"-0.015" to 0.015"Rockwell B80—00000000000000
    3/4" × 3/4"Oversized0.000" to 0.005"0.000" to 0.005"Rockwell B82—00000000000000
    3/4" × 3/4"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B82—00000000000000
    3/4" × 1"Standard-0.015" to 0.015"-0.015" to 0.015"Rockwell B80—000000000000000
    7/8" × 7/8"Oversized0.000" to 0.005"0.000" to 0.005"Rockwell B82—00000000000000
    7/8" × 7/8"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B82—00000000000000
    1" × 1"Oversized0.000" to 0.005"0.000" to 0.005"Rockwell B82—00000000000000
    1" × 1"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B82—00000000000000
    1 1/4" × 1 1/4"Oversized0.000" to 0.006"0.000" to 0.006"Rockwell B82—000000000000000
    1 1/4" × 1 1/4"Undersized-0.006" to 0.000"-0.006" to 0.000"Rockwell B82—00000000000000
    1 1/2" × 1 1/2"Undersized-0.006" to 0.000"-0.006" to 0.000"Rockwell B82—000000000000000
    1 3/4" × 1 3/4"Undersized-0.006" to 0.000"-0.006" to 0.000"Rockwell B82—000000000000000
    2" × 2"Undersized-0.006" to 0.000"-0.006" to 0.000"Rockwell B82—000000000000000
     
    36" Long
    1/8" × 1/8"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—0000000000000
    3/16" × 3/16"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—00000000000000
    1/4" × 1/4"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—00000000000000
    1/4" × 1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—00000000000000
    5/16" × 5/16"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—00000000000000
    5/16" × 5/16"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B82—00000000000000
    3/8" × 3/8"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—00000000000000
    3/8" × 3/8"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B82—00000000000000
    1/2" × 1/2"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—00000000000000
    1/2" × 1/2"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B82—00000000000000
    5/8" × 5/8"Oversized0.000" to 0.005"0.000" to 0.005"Rockwell B82—00000000000000
    5/8" × 5/8"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B82—00000000000000
     
    305 mm Long
    3 mm × 3 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82—00000000000000
    3 mm × 3 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688000000000000000
    4 mm × 4 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 1780000000000000
    4 mm × 4 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688000000000000000
    5 mm × 5 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 1780000000000000
    5 mm × 5 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 68800000000000000
    6 mm × 6 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17800000000000000
    6 mm × 6 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688000000000000000
    7 mm × 7 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17800000000000000
    7 mm × 7 mmUndersized-0.090 mm to 0.000 mm-0.090 mm to 0.000 mmRockwell B82DIN 17800000000000000
    7 mm × 8 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17400000000000000
    8 mm × 8 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17800000000000000
    8 mm × 8 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688000000000000000
    8 mm × 10 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17400000000000000
    8 mm × 12 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17800000000000000
    9 mm × 14 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17400000000000000
    10 mm × 10 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17800000000000000
    10 mm × 10 mmUndersized-0.090 mm to 0.000 mm-0.090 mm to 0.000 mmRockwell B82DIN 17800000000000000
    12 mm × 12 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17800000000000000
    14 mm × 14 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17800000000000000
    16 mm × 16 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17800000000000000
    18 mm × 18 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 17800000000000000
    20 mm × 20 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 178000000000000000
    22 mm × 22 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 178000000000000000
    24 mm × 24 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmRockwell B82DIN 178000000000000000
     
    304 Stainless Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    304 stainless steel key stock offers a good balance of strength, corrosion resistance, and machinability. 304 stainless steel key stock is more corrosion resistant than steel key stock.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    DIN 6880—Key stock that meets DIN 6880 conforms to DIN standards for undersized keys.
    Tolerance,
    mm
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Each
    305 mm Long
    2 mm × 2 mmUndersized-0.025 to 0.000-0.025 to 0.000Rockwell B80DIN 6880000000000000000
    4 mm × 6 mmUndersized-0.075 to 0.000-0.030 to 0.000Rockwell B80DIN 688000000000000000
    6 mm × 10 mmUndersized-0.030 to 0.000-0.036 to 0.000Rockwell B80DIN 688000000000000000
    7 mm × 8 mmUndersized-0.090 to 0.000-0.036 to 0.000Rockwell B80DIN 688000000000000000
    8 mm × 10 mmUndersized-0.036 to 0.000-0.036 to 0.000Rockwell B80DIN 688000000000000000
    8 mm × 12 mmUndersized-0.036 to 0.000-0.043 to 0.000Rockwell B80DIN 688000000000000000
    9 mm × 14 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B80DIN 688000000000000000
     
    1,000 mm Long
    2 mm × 2 mmUndersized-0.025 to 0.000-0.025 to 0.000Rockwell B80DIN 688000000000000000
    3 mm × 5 mmUndersized-0.060 to 0.000-0.030 to 0.000Rockwell B80DIN 688000000000000000
    4 mm × 4 mmUndersized-0.030 to 0.000-0.030 to 0.000Rockwell B80DIN 688000000000000000
    4 mm × 6 mmUndersized-0.075 to 0.000-0.030 to 0.000Rockwell B80DIN 688000000000000000
    5 mm × 5 mmUndersized-0.030 to 0.000-0.030 to 0.000Rockwell B80DIN 688000000000000000
    6 mm × 6 mmUndersized-0.030 to 0.000-0.030 to 0.000Rockwell B80DIN 688000000000000000
    7 mm × 8 mmUndersized-0.090 to 0.000-0.036 to 0.000Rockwell B80DIN 688000000000000000
    8 mm × 8 mmUndersized-0.036 to 0.000-0.036 to 0.000Rockwell B80DIN 688000000000000000
    8 mm × 10 mmUndersized-0.036 to 0.000-0.036 to 0.000Rockwell B80DIN 688000000000000000
    8 mm × 12 mmUndersized-0.036 to 0.000-0.043 to 0.000Rockwell B80DIN 688000000000000000
    9 mm × 14 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B80DIN 6880000000000000000
     
    316 Stainless Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    316 stainless steel key stock has the best corrosion resistance of our stainless steel key stock and may be mildly magnetic. 316 stainless steel key stock is more corrosion resistant than steel key stock.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    DIN 6880—Key stock that meets DIN 6880 conforms to DIN standards for undersized keys.
    Tolerance,
    mm
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Each
    305 mm Long
    4 mm × 6 mmUndersized-0.075 to 0.000-0.030 to 0.000Rockwell B85DIN 6880000000000000000
    14 mm × 25 mmUndersized-0.110 to 0.000-0.052 to 0.000Rockwell B85DIN 6880000000000000000
    16 mm × 28 mmUndersized-0.110 to 0.000-0.052 to 0.000Rockwell B85DIN 6880000000000000000
    18 mm × 32 mmUndersized-0.110 to 0.000-0.062 to 0.000Rockwell B85DIN 6880000000000000000
     
    1,000 mm Long
    3 mm × 3 mmUndersized-0.025 to 0.000-0.025 to 0.000Rockwell B85DIN 688000000000000000
    3 mm × 5 mmUndersized-0.060 to 0.000-0.030 to 0.000Rockwell B85DIN 688000000000000000
    4 mm × 4 mmUndersized-0.030 to 0.000-0.030 to 0.000Rockwell B85DIN 688000000000000000
    5 mm × 5 mmUndersized-0.030 to 0.000-0.030 to 0.000Rockwell B85DIN 688000000000000000
    6 mm × 6 mmUndersized-0.030 to 0.000-0.030 to 0.000Rockwell B85DIN 688000000000000000
    7 mm × 7 mmUndersized-0.036 to 0.000-0.036 to 0.000Rockwell B85DIN 688000000000000000
    7 mm × 8 mmUndersized-0.090 to 0.000-0.036 to 0.000Rockwell B85DIN 688000000000000000
    8 mm × 8 mmUndersized-0.036 to 0.000-0.036 to 0.000Rockwell B85DIN 688000000000000000
    8 mm × 10 mmUndersized-0.036 to 0.000-0.036 to 0.000Rockwell B85DIN 688000000000000000
    8 mm × 12 mmUndersized-0.036 to 0.000-0.043 to 0.000Rockwell B85DIN 688000000000000000
    9 mm × 14 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B85DIN 6880000000000000000
    10 mm × 10 mmUndersized-0.036 to 0.000-0.036 to 0.000Rockwell B85DIN 688000000000000000
    10 mm × 12 mmUndersized-0.036 to 0.000-0.043 to 0.000Rockwell B85DIN 6880000000000000000
    10 mm × 16 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B85DIN 6880000000000000000
    11 mm × 18 mmUndersized-0.110 to 0.000-0.043 to 0.000Rockwell B85DIN 6880000000000000000
    12 mm × 12 mmUndersized-0.043 to 0.000-0.043 to 0.000Rockwell B85DIN 6880000000000000000
    14 mm × 14 mmUndersized-0.043 to 0.000-0.043 to 0.000Rockwell B85DIN 6880000000000000000
    14 mm × 22 mmUndersized-0.110 to 0.000-0.052 to 0.000Rockwell B85DIN 6880000000000000000
    14 mm × 25 mmUndersized-0.110 to 0.000-0.052 to 0.000Rockwell B85DIN 6880000000000000000
    16 mm × 28 mmUndersized-0.110 to 0.000-0.052 to 0.000Rockwell B85DIN 6880000000000000000
     
    316-316L Stainless Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    316-316L stainless steel key stock has the best corrosion resistance of our stainless steel key stock and may be mildly magnetic. 316-316L stainless steel key stock is more corrosion resistant than steel key stock.
    Oversized Tolerance—Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. Press it into place for use in high-torque applications or to replace a key in a worn keyway.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    DIN 6880—Key stock that meets DIN 6880 conforms to DIN standards for undersized keys.
    Tolerance
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Each
    12" Long
    7/64" × 7/64"Oversized0.000" to 0.002"0.000" to 0.002"Not Rated—000000000000000
    7/64" × 7/64"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B86—00000000000000
    1/8" × 1/8"Oversized0.000" to 0.002"0.000" to 0.002"Not Rated—0000000000000
    1/8" × 1/8"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B86—0000000000000
    1/8" × 1/4"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    3/16" × 3/16"Oversized0.000" to 0.002"0.000" to 0.002"Not Rated—00000000000000
    3/16" × 3/16"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B86—0000000000000
    3/16" × 1/4"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    1/4" × 1/8"Oversized0.000" to 0.003"0.000" to 0.003"Not Rated—00000000000000
    1/4" × 3/16"Oversized0.000" to 0.003"0.000" to 0.003"Not Rated—00000000000000
    1/4" × 1/4"Oversized0.000" to 0.002"0.000" to 0.002"Not Rated—00000000000000
    1/4" × 1/4"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    1/4" × 5/16"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    1/4" × 3/8"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    1/4" × 1/2"Oversized0.000" to 0.003"0.000" to 0.003"Not Rated—00000000000000
    1/4" × 1/2"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    5/16" × 1/4"Oversized0.000" to 0.003"0.000" to 0.003"Not Rated—00000000000000
    5/16" × 5/16"Oversized0.000" to 0.002"0.000" to 0.002"Not Rated—00000000000000
    5/16" × 5/16"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    5/16" × 3/8"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    3/8" × 1/4"Oversized0.000" to 0.003"0.000" to 0.003"Not Rated—00000000000000
    3/8" × 5/16"Oversized0.000" to 0.003"0.000" to 0.003"Not Rated—00000000000000
    3/8" × 3/8"Oversized0.000" to 0.003"0.000" to 0.003"Not Rated—00000000000000
    3/8" × 3/8"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    3/8" × 1/2"Oversized0.000" to 0.003"0.000" to 0.003"Not Rated—00000000000000
    3/8" × 1/2"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    1/2" × 1/2"Oversized0.000" to 0.003"0.000" to 0.003"Not Rated—00000000000000
    1/2" × 1/2"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    1/2" × 3/4"Undersized-0.003" to 0.000"-0.004" to 0.000"Rockwell B86—00000000000000
    1/2" × 1"Undersized-0.003" to 0.000"-0.004" to 0.000"Rockwell B86—000000000000000
    5/8" × 5/8"Oversized0.000" to 0.004"0.000" to 0.004"Not Rated—00000000000000
    5/8" × 5/8"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B86—00000000000000
    3/4" × 3/4"Oversized0.000" to 0.004"0.000" to 0.004"Not Rated—00000000000000
    3/4" × 3/4"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B86—00000000000000
    7/8" × 7/8"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B86—000000000000000
    1" × 1"Oversized0.000" to 0.004"0.000" to 0.004"Not Rated—000000000000000
    1" × 1"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B86—000000000000000
     
    36" Long
    1/8" × 1/8"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B86—00000000000000
    3/16" × 3/16"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B86—00000000000000
    1/4" × 1/4"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    5/16" × 5/16"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    3/8" × 3/8"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—00000000000000
    1/2" × 1/2"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B86—000000000000000
    5/8" × 5/8"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B86—000000000000000
    3/4" × 3/4"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B86—000000000000000
    1" × 1"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B86—000000000000000
     
    305 mm Long
    2 mm × 2 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmRockwell B86DIN 68800000000000000
    3 mm × 3 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmNot Rated—0000000000000
    3 mm × 3 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmRockwell B86DIN 68800000000000000
    4 mm × 4 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmNot Rated—00000000000000
    4 mm × 4 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmRockwell B86DIN 68800000000000000
    5 mm × 5 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmRockwell B86DIN 68800000000000000
    6 mm × 6 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmNot Rated—00000000000000
    6 mm × 6 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmRockwell B86DIN 68800000000000000
    7 mm × 7 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmNot Rated—00000000000000
    7 mm × 7 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmRockwell B86DIN 688000000000000000
    7 mm × 8 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmNot Rated—00000000000000
    7 mm × 8 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmRockwell B86DIN 688000000000000000
    8 mm × 8 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmRockwell B86DIN 688000000000000000
    8 mm × 10 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmRockwell B86DIN 688000000000000000
    8 mm × 12 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmRockwell B86DIN 688000000000000000
    9 mm × 14 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmRockwell B86DIN 688000000000000000
    10 mm × 10 mmOversized0.000 mm to 0.076 mm0.000 mm to 0.076 mmNot Rated—00000000000000
    10 mm × 10 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmRockwell B86DIN 688000000000000000
    10 mm × 12 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmRockwell B86DIN 688000000000000000
    10 mm × 16 mmUndersized-0.090 mm to 0.000 mm-0.043 mm to 0.000 mmRockwell B86DIN 688000000000000000
    11 mm × 18 mmUndersized-0.090 mm to 0.000 mm-0.043 mm to 0.000 mmRockwell B86DIN 688000000000000000
    12 mm × 12 mmUndersized-0.043 mm to 0.000 mm-0.043 mm to 0.000 mmRockwell B86DIN 688000000000000000
    12 mm × 20 mmUndersized-0.110 mm to 0.000 mm-0.052 mm to 0.000 mmRockwell B86DIN 688000000000000000
    14 mm × 14 mmUndersized-0.043 mm to 0.000 mm-0.043 mm to 0.000 mmRockwell B86DIN 688000000000000000
    14 mm × 22 mmUndersized-0.110 mm to 0.000 mm-0.052 mm to 0.000 mmRockwell B86DIN 688000000000000000
    16 mm × 16 mmUndersized-0.043 mm to 0.000 mm-0.043 mm to 0.000 mmRockwell B86DIN 688000000000000000
     
    416 Stainless Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    416 stainless steel key stock is stronger than other stainless key stock and can be heat treated for extra strength. It's corrosion resistant and magnetic. 416 stainless steel key stock is more corrosion resistant than steel key stock.
    Oversized Tolerance—Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. Press it into place for use in high-torque applications or to replace a key in a worn keyway.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    Tolerance
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Each
    12" Long
    3/16" × 3/16"Oversized0.000" to 0.002"0.000" to 0.002"Not Rated00000000000000
    3/16" × 3/16"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B860000000000000
    1/4" × 1/4"Oversized0.000" to 0.002"0.000" to 0.002"Not Rated0000000000000
    1/4" × 1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B860000000000000
    5/16" × 5/16"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B8600000000000000
    3/8" × 3/8"Oversized0.000" to 0.003"0.000" to 0.003"Not Rated00000000000000
    3/8" × 3/8"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B8600000000000000
    1/2" × 1/2"Undersized-0.003" to 0.000"-0.003" to 0.000"Rockwell B8600000000000000
    5/8" × 5/8"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B8600000000000000
    3/4" × 3/4"Undersized-0.004" to 0.000"-0.004" to 0.000"Rockwell B8600000000000000
     

    Machine Keys

    Image of Product. Front orientation. Machine Keys. Machine Keys.
    Straight keys, with a square or rectangular cross section, are the most common type of key. Install them in keyways to transmit torque from shafts to gears and other components. Machine keys are often the same material as the shaft and other components with which they are used. To use a key as a sacrificial part, choose a softer key that will shear off when parts are exposed to excessive force, preventing damage to expensive equipment.
    18-8 Stainless Steel—18-8 stainless steel keys offer a balance of strength and corrosion resistance. They may be mildly magnetic.
    Oversized Tolerance—Slightly larger than the size listed in the table, oversized keys fit tightly in a keyway. Press them into place for use in high-torque applications or to replace a key in a worn keyway.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized keys are the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use them when parts need to be taken apart frequently, such as for maintenance or prototyping.
    Tolerance
    Lg.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    18-8 Stainless Steel
     
    1/8" × 1/8"
    1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—1000000000000000
    1/2"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—100000000000000
    1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—100000000000000
    3/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—100000000000000
    1"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—100000000000000
    1 1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—1000000000000000
    1 1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B82—1000000000000000
     
    3/16" × 3/16"
    1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—1000000000000000
    1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—1000000000000000
    3/4"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—100000000000000
    3/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—1000000000000000
    7/8"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—1000000000000000
    1"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—100000000000000
    1"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—1000000000000000
    1 1/8"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—1000000000000000
    1 1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—1000000000000000
    1 1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—50000000000000
    1 3/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—50000000000000
    2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—50000000000000
    2 1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—50000000000000
     
    1/4" × 1/4"
    1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—1000000000000000
    3/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—1000000000000000
    1"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—1000000000000000
    1"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—1000000000000000
    1 1/4"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—50000000000000
    1 1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—50000000000000
    1 1/2"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—50000000000000
    1 1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—50000000000000
    1 3/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—50000000000000
    2"Oversized0.000" to 0.003"0.000" to 0.003"Rockwell B82—500000000000000
    2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
    2 1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
    2 1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
    3"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
    3 1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
     
    5/16" × 5/16"
    1 1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
    1 1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
    2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
    2 1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
     
    3/8" × 3/8"
    1"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
    1 1/4"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
    1 1/2"Undersized-0.002" to 0.000"-0.002" to 0.000"Rockwell B97—500000000000000
     
    316 Stainless Steel
     
    3 mm × 3 mm
    8 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmNot RatedDIN 688550000000000000
    10 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmNot RatedDIN 688550000000000000
    12 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmNot RatedDIN 688550000000000000
    14 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmNot RatedDIN 688550000000000000
    15 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmNot RatedDIN 688550000000000000
    18 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmNot RatedDIN 688550000000000000
    20 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmNot RatedDIN 688550000000000000
    22 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmNot RatedDIN 688550000000000000
    25 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmNot RatedDIN 688550000000000000
    30 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmNot RatedDIN 688550000000000000
    40 mmUndersized-0.025 mm to 0.000 mm-0.025 mm to 0.000 mmNot RatedDIN 6885500000000000000
     
    4 mm × 4 mm
    12 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    14 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    15 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    20 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    25 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    28 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    30 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    32 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    35 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    40 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    50 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
     
    5 mm × 5 mm
    8 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    10 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    12 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    15 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    16 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    18 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    20 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    25 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    30 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    35 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    40 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    50 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    55 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    70 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688510000000000000
     
    6 mm × 6 mm
    10 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    15 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688550000000000000
    20 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    25 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    30 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    32 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    35 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    40 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 6885500000000000000
    45 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688510000000000000
    56 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688510000000000000
    60 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688510000000000000
    65 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688510000000000000
    70 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688510000000000000
    75 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688510000000000000
    80 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688510000000000000
    90 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688510000000000000
    100 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688510000000000000
    120 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmNot RatedDIN 688510000000000000
     
    7 mm × 8 mm
    18 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 6885500000000000000
    20 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 6885500000000000000
    25 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 6885500000000000000
    28 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    30 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    35 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    36 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    40 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    65 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    80 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    90 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    100 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 6885100000000000000
    125 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 6885100000000000000
    150 mmUndersized-0.090 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 6885100000000000000
     
    8 mm × 10 mm
    45 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    50 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    55 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    56 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 688510000000000000
    70 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 6885100000000000000
    90 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 6885100000000000000
    125 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmNot RatedDIN 6885100000000000000
     
    8 mm × 12 mm
    20 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmNot RatedDIN 688510000000000000
    22 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmNot RatedDIN 688510000000000000
    36 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmNot RatedDIN 688510000000000000
    50 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmNot RatedDIN 688510000000000000
    70 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmNot RatedDIN 6885100000000000000
    80 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmNot RatedDIN 6885100000000000000
    110 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmNot RatedDIN 6885100000000000000
    130 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmNot RatedDIN 6885100000000000000
    140 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmNot RatedDIN 6885100000000000000
    150 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmNot RatedDIN 6885100000000000000
    200 mmUndersized-0.036 mm to 0.000 mm-0.043 mm to 0.000 mmNot RatedDIN 6885100000000000000
     

    Step Machine Key Stock

    When a keyway is damaged, cut a new, wider one. This key stock is stepped to match repaired keyways in shafts or gears. Cut it to length to create the machine key you need.
    Machine Key Stock for Gears
    Image of Attribute. Front orientation. Contains Annotated. Machine Key Stock. Step Machine Key Stock, Machine Key Stock for Gears.
    Image of Attribute. Front orientation. CrossSection view. Machine Key Stock. Step Machine Key Stock, Machine Key Stock for Gears.

    18-8 Stainless Steel—18-8 stainless steel key stock offers a balance of strength and corrosion resistance. It may be mildly magnetic. 18-8 stainless steel key stock is more corrosion resistant than steel key stock.
    Oversized Tolerance—Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. Press it into place for use in high-torque applications or to replace a key in a worn keyway.
    For Hub
    Keyway
    For Shaft
    Keyway
    Wd.
    (A)
    Ht.
    (B)
    Wd. (A)
    Tolerance
    Wd.
    (C)
    Ht.
    (D)
    Wd. (C)
    Tolerance
    Ht.
    Tolerance
    Rating
    Ht. Tolerance
    Each
    18-8 Stainless Steel
     
    12" Long
    3/16"3/32"0.000" to 0.002"1/8"1/16"0.000" to 0.002"5/32"Oversized-0.015" to 0.015"00000000000000
    3/8"3/16"0.000" to 0.002"5/16"1/8"0.000" to 0.002"5/16"Oversized-0.015" to 0.015"0000000000000
    3/8"3/16"0.000" to 0.002"5/16"5/32"0.000" to 0.002"11/32"Oversized-0.015" to 0.015"00000000000000
    3/4"3/8"0.000" to 0.002"5/8"5/16"0.000" to 0.002"11/16"Oversized-0.015" to 0.015"00000000000000
     
    Machine Key Stock for Shafts
    Image of Attribute. Front orientation. Contains Annotated. Machine Key Stock. Step Machine Key Stock, Machine Key Stock for Shafts.
    Image of Attribute. Front orientation. CrossSection view. Machine Key Stock. Step Machine Key Stock, Machine Key Stock for Shafts.

    18-8 Stainless Steel—18-8 stainless steel key stock offers a balance of strength and corrosion resistance. It may be mildly magnetic. 18-8 stainless steel key stock is more corrosion resistant than steel key stock.
    Oversized Tolerance—Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. Press it into place for use in high-torque applications or to replace a key in a worn keyway.
    For Hub
    Keyway
    For Shaft
    Keyway
    Wd.
    (A)
    Ht.
    (B)
    Wd. (A)
    Tolerance
    Wd.
    (C)
    Ht.
    (D)
    Wd. (C)
    Tolerance
    Ht.
    Tolerance
    Rating
    Ht. Tolerance
    Each
    18-8 Stainless Steel
     
    12" Long
    3/16"3/32"0.000" to 0.002"1/4"3/32"0.000" to 0.002"3/16"Oversized-0.015" to 0.015"00000000000000
    3/16"3/32"0.000" to 0.002"1/4"1/8"0.000" to 0.002"7/32"Oversized-0.015" to 0.015"00000000000000
    1/4"1/8"0.000" to 0.002"5/16"1/8"0.000" to 0.002"1/4"Oversized-0.015" to 0.015"0000000000000
    1/4"1/8"0.000" to 0.002"3/8"1/8"0.000" to 0.002"1/4"Oversized-0.015" to 0.015"00000000000000
    1/4"1/8"0.000" to 0.002"3/8"3/16"0.000" to 0.002"5/16"Oversized-0.015" to 0.015"00000000000000
    3/8"3/16"0.000" to 0.002"7/16"5/32"0.000" to 0.002"11/32"Oversized-0.015" to 0.015"00000000000000
    3/8"3/16"0.000" to 0.002"1/2"3/16"0.000" to 0.002"3/8"Oversized-0.015" to 0.015"00000000000000
    3/8"3/16"0.000" to 0.002"1/2"1/4"0.000" to 0.002"7/16"Oversized-0.015" to 0.015"00000000000000
    1/2"1/4"0.000" to 0.002"5/8"5/16"0.000" to 0.002"9/16"Oversized-0.015" to 0.015"00000000000000
    3/4"3/8"0.000" to 0.002"7/8"7/16"0.000" to 0.002"13/16"Oversized-0.015" to 0.015"00000000000000
     

    Oversized Key Stock Assortments

    Image of Product. Front orientation. Machine Keys. Oversized Key Stock Assortments.
    Image of Product. Front orientation. ZoomedIn view. Machine Keys. Oversized Key Stock Assortments.
    Make a key that is the exact length you need. Because this key stock is slightly larger than standard key stock, keys will fit tightly in worn keyways.
    18-8 Stainless Steel—18-8 stainless steel key stock is chemical resistant and may be mildly magnetic.
    No. of
    Pieces
    Straight Keys Included
    Key Size
    Tolerance
    Container
    Type
    Each
    18-8 Stainless Steel
    71/8" × 1/8" × 12" Lg. (1 Piece)
    3/16" × 3/16" × 12" Lg. (1 Piece)
    1/4" × 1/4" × 12" Lg. (1 Piece)
    5/16" × 5/16" × 12" Lg. (1 Piece)
    3/8" × 3/8" × 12" Lg. (1 Piece)
    7/16" × 7/16" × 12" Lg. (1 Piece)
    1/2" × 1/2" × 12" Lg. (1 Piece)    		0" to 0.003"Cardboard Tube000000000000000
    311/8" × 1/8" × 12" Lg. (5 Pieces)
    3/16" × 3/16" × 12" Lg. (5 Pieces)
    1/4" × 1/4" × 12" Lg. (5 Pieces)
    5/16" × 5/16" × 12" Lg. (5 Pieces)
    3/8" × 3/8" × 12" Lg. (5 Pieces)
    7/16" × 7/16" × 12" Lg. (3 Pieces)
    1/2" × 1/2" × 12" Lg. (3 Pieces)    		0" to 0.003"Cardboard Box000000000000000
    314 mm × 4 mm × 305 mm Lg. (5 Pieces)
    5 mm × 5 mm × 305 mm Lg. (5 Pieces)
    6 mm × 6 mm × 305 mm Lg. (5 Pieces)
    7 mm × 7 mm × 305 mm Lg. (5 Pieces)
    8 mm × 8 mm × 305 mm Lg. (5 Pieces)
    10 mm × 10 mm × 305 mm Lg. (3 Pieces)
    12 mm × 12 mm × 305 mm Lg. (3 Pieces)    		0 mm to 0.076 mmCardboard Box000000000000000
     
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