McMaster-Carr logo
    Filter by
    Material
    Key Type
    Tolerance Rating
    System of Measurement
    Minimum Hardness
    DFARS Specialty Metals
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Specifications Met
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    24 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.
    360 Brass
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    360 brass key stock is corrosion resistant and nonmagnetic. 360 brass is softer than other metals, so it's often used for shear keys.
    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"Standard-0.003" to 0.003"-0.003" to 0.003"Rockwell B35—98500A10000000
    5/32" × 5/32"Standard-0.004" to 0.004"-0.004" to 0.004"Rockwell B35—98500A3600000
    3/16" × 3/16"Standard-0.003" to 0.003"-0.003" to 0.003"Rockwell B35—98500A1170000
    1/4" × 1/4"Standard-0.004" to 0.004"-0.004" to 0.004"Rockwell B35—98500A1360000
    5/16" × 5/16"Standard-0.003" to 0.003"-0.003" to 0.003"Rockwell B35—98500A1500000
    3/8" × 3/8"Standard-0.003" to 0.003"-0.003" to 0.003"Rockwell B35—98500A16500000
    7/16" × 7/16"Standard-0.003" to 0.003"-0.003" to 0.003"Rockwell B35—98500A17900000
    1/2" × 1/2"Standard-0.003" to 0.003"-0.003" to 0.003"Rockwell B35—98500A18700000
    5/8" × 5/8"Standard-0.004" to 0.004"-0.004" to 0.004"Rockwell B35—98500A20600000
    3/4" × 3/4"Standard-0.004" to 0.004"-0.004" to 0.004"Rockwell B35—98500A22600000
    7/8" × 7/8"Standard-0.005" to 0.005"-0.005" to 0.005"Rockwell B35—98500A45000000
    1" × 1"Standard-0.004" to 0.004"-0.004" to 0.004"Rockwell B35—98500A25700000
    1 1/4" × 1 1/4"Standard-0.005" to 0.005"-0.005" to 0.005"Rockwell B35—98500A274000000
     
    36" Long
    1/8" × 1/8"Standard-0.004" to 0.004"-0.004" to 0.004"Rockwell B35—98500A1010000
    3/16" × 3/16"Standard-0.004" to 0.004"-0.004" to 0.004"Rockwell B35—98500A11800000
    1/4" × 1/4"Standard-0.004" to 0.004"-0.004" to 0.004"Rockwell B35—98500A13700000
    5/16" × 5/16"Standard-0.004" to 0.004"-0.004" to 0.004"Rockwell B35—98500A15100000
    3/8" × 3/8"Standard-0.004" to 0.004"-0.004" to 0.004"Rockwell B35—98500A16600000
    1/2" × 1/2"Standard-0.004" to 0.004"-0.004" to 0.004"Rockwell B35—98500A18800000
     
    305 mm Long
    3 mm × 3 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmRockwell B35DIN 688090457A71000000
    4 mm × 4 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmRockwell B35DIN 688090457A72000000
    5 mm × 5 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmRockwell B35DIN 688090457A73000000
    6 mm × 6 mmUndersized-0.030 mm to 0.000 mm-0.030 mm to 0.000 mmRockwell B35DIN 688090457A74000000
    8 mm × 8 mmUndersized-0.036 mm to 0.000 mm-0.036 mm to 0.000 mmRockwell B35DIN 688090457A76000000
     
    back to top