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    65 Products
    About Hex Nuts
    industrial info icon

    Choose a hex nut with the right profile, material, and strength for your application.

    Thin-Profile Hex Nuts

    About half the height of standard-profile nuts, these fit in spaces with low clearance. You can also use them as jam nuts by threading them against another hex nut to hold it in place.
    Medium-Strength Steel
    Image of Product. Front orientation. Hex Nuts. Thin-Profile Hex Nuts.
    These Grade 5 or Class 04 nuts are your go-to for fastening most machinery and equipment. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.
    Zinc-Yellow-Chromate-Plated Steel—With a more durable finish than clear zinc plating, these nuts are suitable for most wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.
    Thread Size
    Wd.,
    mm
    Ht.,
    mm
    Fastener Strength
    Grade/Class
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Yellow-Chromate-Plated Steel
    M4 × 0.7 mm72.2ISO Class 04
    DIN 439B, ISO 403510095027A11100000
    M5 × 0.8 mm82.7ISO Class 04
    DIN 439B, ISO 403510095027A1120000
    M6 × 1 mm103.2ISO Class 04
    DIN 439B, ISO 403510095027A1130000
    M8 × 1 mm134ISO Class 04
    DIN 439B, ISO 40352593737A11100000
    M8 × 1.25 mm134ISO Class 04
    DIN 439B, ISO 403510095027A11400000
    M10 × 1.25 mm175ISO Class 04
    DIN 439B, ISO 40352593737A1120000
    M10 × 1.5 mm175ISO Class 04
    DIN 439B, ISO 40355095027A11500000
    M12 × 1.5 mm196ISO Class 04
    DIN 439B, ISO 40352593737A1130000
    M12 × 1.75 mm196ISO Class 04
    DIN 439B, ISO 40355095027A11600000
    M14 × 1.5 mm227ISO Class 04
    DIN 439B, ISO 40352593737A1140000
    M14 × 2 mm227ISO Class 04
    DIN 439B, ISO 40351095027A1170000
    M16 × 1.5 mm248ISO Class 04
    DIN 439B, ISO 40351093737A1150000
    M16 × 2 mm248ISO Class 04
    DIN 439B, ISO 40352595027A11800000
    M18 × 1.5 mm279ISO Class 04
    DIN 439B, ISO 4035593737A1160000
    M20 × 1.5 mm3010ISO Class 04
    DIN 439B, ISO 40351093737A1170000
    M20 × 2.5 mm3010ISO Class 04
    DIN 439B, ISO 40351095027A11900000
    M22 × 1.5 mm3211ISO Class 04
    DIN 439B, ISO 4035593737A1180000
    M30 × 2 mm4615ISO Class 04
    DIN 439B, ISO 4035193737A1190000
     
    High-Strength Steel
    Image of Product. Front orientation. Hex Nuts. Thin-Profile Hex Nuts.
    Rated Grade 8, Grade C, or Class 10, these nuts are about 25% stronger than medium-strength steel nuts. They are commonly used to fasten components in valves, pumps, motors, and other high-stress applications. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.
    Zinc-Yellow-Chromate-Plated Steel—With a more durable finish than clear zinc plating, these nuts are suitable for most wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.
    Thread
    Size
    Wd.
    Ht.
    Fastener Strength
    Grade/Class
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Zinc-Yellow-Chromate-Plated Steel
    1/4"-20
    7/16"5/32"SAE Grade 8
    ASME B18.2.210093839A029000000
    1/4"-28
    7/16"5/32"SAE Grade 8
    ASME B18.2.210093839A80500000
    5/16"-18
    1/2"3/16"SAE Grade 8
    ASME B18.2.25093839A03000000
    5/16"-24
    1/2"3/16"SAE Grade 8
    ASME B18.2.25093839A81000000
    3/8"-16
    9/16"7/32"SAE Grade 8
    ASME B18.2.25093839A03100000
    3/8"-24
    9/16"7/32"SAE Grade 8
    ASME B18.2.25093839A81500000
    7/16"-14
    11/16"1/4"SAE Grade 8
    ASME B18.2.22593839A81800000
    7/16"-20
    11/16"1/4"SAE Grade 8
    ASME B18.2.22593839A82000000
    1/2"-13
    3/4"5/16"SAE Grade 8
    ASME B18.2.22593839A82300000
    1/2"-20
    3/4"5/16"SAE Grade 8
    ASME B18.2.22593839A82500000
    9/16"-12
    7/8"5/16"SAE Grade 8
    ASME B18.2.21093839A1100000
    9/16"-18
    7/8"5/16"SAE Grade 8
    ASME B18.2.22093839A83000000
    5/8"-11
    15/16"3/8"SAE Grade 8
    ASME B18.2.21093839A83200000
    5/8"-18
    15/16"3/8"SAE Grade 8
    ASME B18.2.21093839A83500000
    3/4"-10
    1 1/8"27/64"SAE Grade 8
    ASME B18.2.21093839A83700000
    3/4"-16
    1 1/8"27/64"SAE Grade 8
    ASME B18.2.21093839A84000000
    7/8"-9
    1 5/16"31/64"SAE Grade 8
    ASME B18.2.2593839A8430000
    7/8"-14
    1 5/16"31/64"SAE Grade 8
    ASME B18.2.2593839A84500000
    1"-8
    1 1/2"35/64"SAE Grade 8
    ASME B18.2.2593839A85200000
    1"-14
    1 1/2"35/64"SAE Grade 8
    ASME B18.2.2593839A85500000
    1 1/8"-7
    1 11/16"39/64"SAE Grade 8
    ASME B18.2.2193839A0390000
    1 1/8"-12
    1 11/16"39/64"SAE Grade 8
    ASME B18.2.2193839A8580000
    1 1/4"-7
    1 7/8"23/32"SAE Grade 8
    ASME B18.2.2193839A0400000
    1 1/4"-12
    1 7/8"23/32"SAE Grade 8
    ASME B18.2.2193839A8600000
    1 3/8"-6
    2 1/16"25/32"SAE Grade 8
    ASME B18.2.2193839A66000000
    1 1/2"-6
    2 1/4"27/32"SAE Grade 8
    ASME B18.2.2193839A04300000
    1 1/2"-12
    2 1/4"27/32"SAE Grade 8
    ASME B18.2.2193839A86500000
    1 3/4"-12
    2 5/8"31/32"SAE Grade 8
    ASME B18.2.2193839A67000000
    2"-4 1/2
    3"1 3/32"SAE Grade 8
    ASME B18.2.2193839A12000000
    2"-12
    3"1 3/32"SAE Grade 8
    ASME B18.2.2193839A13000000
     

    Thin-Profile Nylon-Insert Locknuts

    About half the height of standard-profile locknuts, these fit in spaces with low clearance. You can also use them as jam nuts by threading them against a hex nut to hold it in place. The nylon insert grips the screw to prevent loosening from moderate vibration without damaging threads. However, the insert may become brittle if exposed to high temperatures. These locknuts are reusable a handful of times, but the holding power decreases with each use.
    High-Strength Steel
    Image of Product. Front orientation. Locknuts. Thin-Profile Nylon-Insert Locknuts.
    Rated Grade 8, Grade C, or Class 10, these locknuts are about 25% stronger than medium-strength steel nuts. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.
    Zinc-Yellow-Chromate-Plated Steel—With a more durable finish than clear zinc plating, these nuts are suitable for most wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.
    Thread
    Size
    Wd.
    Ht.
    Fastener Strength
    Grade/Class
    Insert Max.
    Temp., ° F
    Pkg.
    Qty.
    Pkg.
    Zinc-Yellow-Chromate-Plated Steel
    1/4"-20
    7/16"13/64"SAE Grade 8
    Not Rated10094945A20500000
    1/4"-28
    7/16"13/64"SAE Grade 8
    2501094945A1390000
    5/16"-18
    1/2"1/4"SAE Grade 8
    Not Rated10094945A21300000
    5/16"-24
    1/2"1/4"SAE Grade 8
    2501094945A11900000
    3/8"-16
    9/16"17/64"SAE Grade 8
    Not Rated10094945A21700000
    3/8"-24
    9/16"17/64"SAE Grade 8
    Not Rated5094945A21800000
    7/16"-14
    5/8"5/16"SAE Grade 8
    Not Rated2594945A2600000
    7/16"-20
    5/8"5/16"SAE Grade 8
    Not Rated2594945A2700000
    1/2"-13
    3/4"5/16"SAE Grade 8
    Not Rated2594945A22400000
    1/2"-20
    3/4"5/16"SAE Grade 8
    250594945A1210000
    5/8"-11
    15/16"25/64"SAE Grade 8
    Not Rated1094945A2270000
    5/8"-18
    15/16"25/64"SAE Grade 8
    250594945A1220000
    3/4"-16
    1 1/16"13/32"SAE Grade 8
    250194945A1230000
    7/8"-14
    1 1/4"15/32"SAE Grade 8
    250194945A1240000
    1"-14
    1 7/16"35/64"SAE Grade 8
    250194945A1250000
    1 1/4"-12
    1 13/16"3/4"SAE Grade 8
    Not Rated194945A28000000
    1 1/2"-12
    2 3/16"51/64"SAE Grade 8
    Not Rated194945A29000000
     
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