Thread Size Thread Size |
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Material Material |
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Finish Finish |
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Nut Type Nut Type | Show |
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 | Locknut |
Locking Type Locking Type | Show |
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 | Lock Washer |
Locking Type Locking Type | Hide |
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| Nylon Insert | Serrations |
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| Distorted Thread | Lock Washer |
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| Cotter Pin | Flex-Top |
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| Steel Insert | Thread Forming |
Washer Material Washer Material |
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Height Height |
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Washer Type Washer Type |
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Thread Direction Thread Direction |
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 | Right Hand |
Washer OD Washer OD |
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Drive Style Drive Style |
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 | External Hex |
Fastener Strength Grade/Class Fastener StrengthGrade/Class |
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 | Class 8 |
Number of Pieces Number of Pieces |
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Container Features Container Features |
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Container Type Container Type |
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About Nuts, Materials, and Finishes
More
Steel Locknuts with External-Tooth Lock Washer
Also known as Keps and K-Lock nuts, these locknuts have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance. Height includes the thickness of the washer. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Washer | |||||||
|---|---|---|---|---|---|---|---|
| Thread Size | Wd. | Ht. | Material | OD | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||
| 4-40 | 1/4" | 7/64" | Steel | 0.281" | 100 | 000000000 | 00000 |
| 5-40 | 5/16" | 9/64" | Steel | 0.344" | 100 | 000000000 | 00000 |
| 6-32 | 1/4" | 1/8" | Steel | 0.281" | 100 | 000000000 | 00000 |
| 6-32 | 5/16" | 9/64" | Steel | 0.344" | 100 | 000000000 | 0000 |
| 8-32 | 5/16" | 5/32" | Steel | 0.344" | 100 | 000000000 | 00000 |
| 8-32 | 11/32" | 5/32" | Steel | 0.375" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 5/32" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 10-32 | 3/8" | 5/32" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 12-24 | 7/16" | 13/64" | Steel | 0.5" | 50 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 15/64" | Steel | 0.5" | 100 | 000000000 | 0000 |
| 1/4"-28 | 7/16" | 15/64" | Steel | 0.5" | 100 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 21/64" | Steel | 0.578" | 100 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 21/64" | Steel | 0.578" | 100 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 25/64" | Steel | 0.656" | 100 | 000000000 | 00000 |
| 3/8"-24 | 9/16" | 25/64" | Steel | 0.656" | 100 | 000000000 | 00000 |
| 1/2"-13 | 3/4" | 17/32" | Steel | 0.891" | 10 | 000000000 | 0000 |
Black Zinc-Plated Steel | |||||||
| 4-40 | 1/4" | 1/8" | Steel | 0.281" | 100 | 000000000 | 0000 |
| 6-32 | 5/16" | 9/64" | Steel | 0.344" | 100 | 000000000 | 0000 |
| 8-32 | 11/32" | 11/64" | Steel | 0.375" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 11/64" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 10-32 | 3/8" | 11/64" | Steel | 0.406" | 100 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 15/64" | Steel | 0.5" | 100 | 000000000 | 00000 |
Metric Steel Locknuts with External-Tooth Lock Washer
Also known as Keps and K-lock nuts, these locknuts have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance. Height includes the thickness of the washer. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread | Washer | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Material | OD, mm | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | ||||||||
| M3 | 0.5 | 5.5 | 3.3 | Steel | 7.1 | 100 | 000000000 | 00000 |
| M4 | 0.7 | 7 | 4.1 | Steel | 8.5 | 100 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | Steel | 9.5 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.2 | Steel | 12 | 100 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 8.5 | Steel | 15.5 | 25 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 9.7 | Steel | 20.1 | 10 | 000000000 | 0000 |
Black Zinc-Plated Steel—Class 8 | ||||||||
| M3 | 0.5 | 5.5 | 3 | Steel | 7.1 | 100 | 000000000 | 00000 |
| M4 | 0.7 | 7 | 4.1 | Steel | 8.5 | 100 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | Steel | 9.5 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.2 | Steel | 12 | 50 | 000000000 | 00000 |
| M8 | 1.25 | 13 | 8.5 | Steel | 15.5 | 25 | 000000000 | 00000 |
| M10 | 1.5 | 17 | 9.7 | Steel | 20.1 | 10 | 000000000 | 00000 |
Stainless Steel Locknuts with External-Tooth Lock Washer
These stainless steel locknuts have good chemical resistance and may be mildly magnetic. Also known as Keps and K-Lock nuts, they have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance. Height includes the thickness of the washer.
For technical drawings and 3-D models, click on a part number.
Washer | |||||||
|---|---|---|---|---|---|---|---|
| Thread Size | Wd. | Ht. | Material | OD | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||
Standard Hex Nut Profile | |||||||
| 4-40 | 1/4" | 1/8" | 400 Stainless Steel | 0.281" | 100 | 000000000 | 00000 |
| 6-32 | 5/16" | 9/64" | 400 Stainless Steel | 0.344" | 100 | 000000000 | 0000 |
| 8-32 | 11/32" | 11/64" | 400 Stainless Steel | 0.375" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 11/64" | 400 Stainless Steel | 0.406" | 100 | 000000000 | 0000 |
| 10-32 | 3/8" | 11/64" | 400 Stainless Steel | 0.406" | 100 | 000000000 | 0000 |
| 12-24 | 7/16" | 11/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 0000 |
| 1/4"-20 | 7/16" | 15/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 0000 |
| 1/4"-28 | 7/16" | 15/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 21/64" | 400 Stainless Steel | 0.578" | 25 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 21/64" | 400 Stainless Steel | 0.578" | 25 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 25/64" | 400 Stainless Steel | 0.656" | 25 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 25/64" | 400 Stainless Steel | 0.656" | 10 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 7/16" | 400 Stainless Steel | 0.871" | 10 | 000000000 | 0000 |
Narrow Hex Nut Profile | |||||||
| 6-32 | 1/4" | 3/32" | 400 Stainless Steel | 0.344" | 100 | 000000000 | 00000 |
Metric Stainless Steel Locknuts
with External-Tooth Lock Washer
These locknuts have good chemical resistance and may be mildly magnetic. Also known as Keps and K-Lock nuts, they have a free-spinning tooth lock washer that grips the material surface instead of threads for easy installation and mild vibration resistance. Height includes the thickness of the washer.
Black-oxide stainless steel nuts have a dark surface color.
For technical drawings and 3-D models, click on a part number.
Thread | Washer | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Material | OD, mm | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||||
| M3 | 0.5 | 5.5 | 3.3 | 400 Stainless Steel | 6.5 | 50 | 000000000 | 000000 |
| M4 | 0.7 | 7 | 4.1 | 400 Stainless Steel | 8.2 | 50 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | 400 Stainless Steel | 9.5 | 25 | 000000000 | 0000 |
| M6 | 1 | 10 | 6.2 | 400 Stainless Steel | 11.5 | 25 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8.5 | 18-8 Stainless Steel | 15.1 | 5 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 9.7 | 18-8 Stainless Steel | 19.2 | 5 | 000000000 | 00000 |
Black-Oxide 18-8 Stainless Steel | ||||||||
| M3 | 0.5 | 5.5 | 3.3 | Black-Oxide 400 Stainless Steel | 6.5 | 25 | 000000000 | 0000 |
| M4 | 0.7 | 7 | 4.1 | Black-Oxide 400 Stainless Steel | 8.2 | 25 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.2 | Black-Oxide 400 Stainless Steel | 9.5 | 25 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.2 | Black-Oxide 400 Stainless Steel | 11.5 | 25 | 000000000 | 00000 |
Metric Steel Nonmarring Locknuts
with Spring-Lock Washer
A conical washer acts as a spring to add tension between the nut and the material surface for easy installation and mild vibration resistance. They have a smooth rim to resist scratching materials when tightened. Also known as Keps and K-lock nuts. Height includes the thickness of the washer.
Zinc-plated locknuts have an outer layer of zinc that provides corrosion resistance in wet environments.
Black oxide locknuts are mildly corrosion resistant and have a dark surface color.
For technical drawings and 3-D models, click on a part number.
Thread | Washer | |||||||
|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Material | OD, mm | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel—Class 8 | ||||||||
| M3 | 0.5 | 5.5 | 3.8 | Steel | 8 | 50 | 000000000 | 00000 |
| M4 | 0.7 | 7 | 4.2 | Steel | 10 | 100 | 000000000 | 0000 |
| M5 | 0.8 | 8 | 5.3 | Steel | 12 | 100 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.6 | Steel | 14 | 50 | 000000000 | 0000 |
| M8 | 1.25 | 13 | 8.8 | Steel | 18 | 50 | 000000000 | 00000 |
| M10 | 1.5 | 17 | 10.7 | Steel | 22 | 10 | 000000000 | 0000 |
| M12 | 1.75 | 19 | 13.8 | Steel | 25.5 | 25 | 000000000 | 00000 |
Black-Oxide Steel—Class 8 | ||||||||
| M3 | 0.5 | 6 | 3.5 | Steel | 10 | 50 | 000000000 | 00000 |
| M4 | 0.7 | 7 | 4.2 | Steel | 10 | 50 | 000000000 | 00000 |
| M5 | 0.8 | 8 | 5.3 | Steel | 12 | 50 | 000000000 | 00000 |
| M6 | 1 | 10 | 6.6 | Steel | 14 | 25 | 000000000 | 0000 |
Steel Nonmarring Locknuts with Spring-Lock Washer
These locknuts have a curved washer that acts as a spring to add tension between the nut and the material surface for easy installation and mild vibration resistance. The smooth rim makes them less likely to scratch materials when tightened than locknuts with a tooth lock washer. Also known as Keps and K-lock nuts. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Assortments of Locknuts with External-Tooth Lock Washer
Teeth bite into surfaces for easy installation and mild vibration resistance.
Zinc-plated steel nuts are corrosion resistant in wet environments.
18-8 stainless steel nuts are chemical resistant and may be mildly magnetic.