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About Nuts, Materials, and Finishes
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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 | 00000 |
| 8-32 | 11/32" | 11/64" | 400 Stainless Steel | 0.375" | 100 | 000000000 | 00000 |
| 10-24 | 3/8" | 11/64" | 400 Stainless Steel | 0.406" | 100 | 000000000 | 00000 |
| 10-32 | 3/8" | 11/64" | 400 Stainless Steel | 0.406" | 100 | 000000000 | 00000 |
| 12-24 | 7/16" | 11/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 00000 |
| 1/4"-20 | 7/16" | 15/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 00000 |
| 1/4"-28 | 7/16" | 15/64" | 400 Stainless Steel | 0.5" | 50 | 000000000 | 00000 |
| 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 | 00000 |
| 3/8"-16 | 9/16" | 25/64" | 400 Stainless Steel | 0.656" | 25 | 000000000 | 00000 |
| 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 |
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" | 9/64" | 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" | 3/16" | Steel | 0.5" | 50 | 000000000 | 00000 |
| 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 | 00000 |
| 5/16"-24 | 1/2" | 5/16" | Steel | 0.592" | 50 | 000000000 | 00000 |
| 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" | 31/64" | Steel | 0.891" | 10 | 000000000 | 00000 |
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" | 5/32" | Steel | 0.375" | 100 | 000000000 | 0000 |
| 10-24 | 3/8" | 5/32" | Steel | 0.406" | 100 | 000000000 | 00000 |
| 10-32 | 3/8" | 5/32" | Steel | 0.406" | 100 | 000000000 | 00000 |
| 1/4"-20 | 7/16" | 7/32" | 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 | 000000 |
| 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 | 00000 |
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 |
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.