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Locking Type Locking Type |
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| Nylon Insert | Serrations |
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| Distorted Thread | Steel Insert |
Hex Nut Profile Hex Nut Profile |
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| Standard | Thin |
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Thread Spacing Thread Spacing |
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Thread Direction Thread Direction |
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Flange Diameter Flange Diameter |
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Distorted Thread Type Distorted Thread Type |
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About Nuts, Materials, and Finishes
More
High-Strength Steel Nylon-Insert Locknuts—Grade 8
A nylon insert grips the bolt to resist loosening without damaging threads. These nuts are reusable, but their holding power lessens with each use. Made from Grade 8 steel, they're about 25% stronger than medium-strength steel locknuts.
Zinc yellow-chromate plated steel locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Grade 8 | ||||||
|---|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 5/16" | 220° | 25 | 000000000 | 00000 |
| 1/4"-28 | 7/16" | 5/16" | 220° | 25 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 11/32" | 220° | 20 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 11/32" | 220° | 20 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 29/64" | 220° | 20 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 29/64" | 220° | 20 | 000000000 | 0000 |
| 7/16"-14 | 5/8" | 29/64" | 220° | 10 | 000000000 | 0000 |
| 7/16"-20 | 5/8" | 29/64" | 220° | 10 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 19/32" | 220° | 10 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 19/32" | 220° | 10 | 000000000 | 0000 |
| 9/16"-12 | 7/8" | 41/64" | 220° | 5 | 000000000 | 0000 |
| 9/16"-18 | 7/8" | 41/64" | 220° | 5 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 3/4" | 220° | 5 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 3/4" | 220° | 5 | 000000000 | 0000 |
| 3/4"-10 | 1 1/16" | 7/8" | 220° | 5 | 000000000 | 0000 |
| 3/4"-16 | 1 1/16" | 7/8" | 220° | 5 | 000000000 | 0000 |
| 7/8"-9 | 1 1/4" | 63/64" | 220° | 1 | 000000000 | 0000 |
| 7/8"-14 | 1 1/4" | 63/64" | 220° | 1 | 000000000 | 0000 |
| 1"-8 | 1 7/16" | 1 3/64" | 220° | 1 | 000000000 | 0000 |
| 1"-8 | 1 5/8" | 1 9/32" | 220° | 1 | 000000000 | 0000 |
| 1"-12 | 1 7/16" | 1 3/64" | 220° | 5 | 000000000 | 00000 |
| 1"-14 | 1 7/16" | 1 3/64" | 220° | 1 | 000000000 | 0000 |
| 1 1/8"-7 | 1 5/8" | 1 11/64" | 220° | 1 | 000000000 | 0000 |
| 1 1/8"-12 | 1 5/8" | 1 11/64" | 220° | 1 | 000000000 | 0000 |
| 1 1/4"-7 | 1 13/16" | 1 25/64" | 220° | 1 | 000000000 | 0000 |
| 1 1/4"-7 | 2 1/64" | 1 41/64" | 220° | 1 | 000000000 | 00000 |
| 1 1/4"-8 | 2 1/64" | 1 41/64" | 220° | 1 | 000000000 | 00000 |
| 1 1/4"-12 | 1 13/16" | 1 25/64" | 220° | 1 | 000000000 | 00000 |
| 1 3/8"-8 | 2 13/16" | 1 51/64" | 220° | 1 | 000000000 | 00000 |
| 1 1/2"-6 | 2 13/64" | 1 39/64" | 220° | 1 | 000000000 | 00000 |
| 1 1/2"-6 | 2 25/64" | 1 59/64" | 220° | 1 | 000000000 | 00000 |
| 1 1/2"-8 | 2 25/64" | 1 59/64" | 220° | 1 | 000000000 | 00000 |
| 1 1/2"-12 | 2 13/64" | 1 39/64" | 220° | 1 | 000000000 | 00000 |
| 1 3/4"-5 | 2 49/64" | 2 5/16" | 220° | 1 | 000000000 | 00000 |
| 1 3/4"-8 | 2 49/64" | 2 5/16" | 220° | 1 | 000000000 | 00000 |
| 1 3/4"-12 | 2 49/64" | 2 5/16" | 220° | 1 | 000000000 | 00000 |
| 2"-4 1/2 | 3 9/64" | 2 13/32" | 220° | 1 | 000000000 | 00000 |
| 2"-8 | 3 9/64" | 2 13/32" | 220° | 1 | 000000000 | 00000 |
| 2"-12 | 3 9/64" | 2 13/32" | 220° | 1 | 000000000 | 00000 |
| 2 1/4"-8 | 3 33/64" | 2 13/16" | 220° | 1 | 000000000 | 00000 |
High-Strength Steel Thin Nylon-Insert Locknuts
Half the height of standard nylon-insert locknuts, use these in low-clearance applications or jam one against a hex nut to hold it in place. They have a nylon insert that grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use. Made from Grade 8 steel, they're about 25% stronger than medium-strength steel thin locknuts. All have a finish that resists corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Grade 8 | ||||||
|---|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 13/64" | Not Rated | 100 | 000000000 | 00000 |
| 5/16"-18 | 1/2" | 1/4" | Not Rated | 100 | 000000000 | 00000 |
| 3/8"-16 | 9/16" | 17/64" | Not Rated | 100 | 000000000 | 00000 |
| 3/8"-24 | 9/16" | 17/64" | Not Rated | 50 | 000000000 | 00000 |
| 7/16"-14 | 5/8" | 5/16" | Not Rated | 25 | 000000000 | 0000 |
| 7/16"-20 | 5/8" | 5/16" | Not Rated | 25 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 5/16" | Not Rated | 25 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 25/64" | Not Rated | 10 | 000000000 | 0000 |
| 1 1/4"-12 | 1 13/16" | 3/4" | Not Rated | 1 | 000000000 | 0000 |
| 1 1/2"-12 | 2 3/16" | 51/64" | Not Rated | 1 | 000000000 | 00000 |
High-Strength Steel Top-Lock Distorted-Thread Locknuts
An irregularly shaped thread at the top of the nut grips the bolt for a stronger hold than nylon-insert locknuts. They thread on from the bottom of the nut, allowing more threads to engage the bolt before tightening for easier installation than center-lock distorted thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. They're not reusable. Comparable in strength to Grade 8 bolts, they're about 25% stronger than medium-strength steel locknuts.
Zinc-plated and zinc yellow-chromate plated locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Grade C | |||||
|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 7/32" | 50 | 000000000 | 00000 |
| 1/4"-28 | 7/16" | 7/32" | 50 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 17/64" | 50 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 17/64" | 50 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 21/64" | 25 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 21/64" | 25 | 000000000 | 0000 |
| 7/16"-14 | 11/16" | 3/8" | 25 | 000000000 | 0000 |
| 7/16"-20 | 11/16" | 3/8" | 25 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 7/16" | 10 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 7/16" | 10 | 000000000 | 0000 |
| 9/16"-12 | 7/8" | 31/64" | 10 | 000000000 | 0000 |
| 9/16"-18 | 7/8" | 31/64" | 10 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 35/64" | 5 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 35/64" | 5 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 41/64" | 5 | 000000000 | 0000 |
| 3/4"-16 | 1 1/8" | 41/64" | 5 | 000000000 | 0000 |
| 7/8"-9 | 1 5/16" | 3/4" | 1 | 000000000 | 0000 |
| 7/8"-14 | 1 5/16" | 3/4" | 1 | 000000000 | 0000 |
| 1"-8 | 1 1/2" | 55/64" | 1 | 000000000 | 0000 |
| 1"-14 | 1 1/2" | 55/64" | 1 | 000000000 | 0000 |
Thread | ||||||
|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Class 10 | ||||||
| M6 | 1 | 10 | 6 | 100 | 000000000 | 000000 |
| M8 | 1.25 | 13 | 8 | 50 | 000000000 | 0000 |
| M10 | 1.25 | 17 | 10 | 10 | 000000000 | 0000 |
| M10 | 1.5 | 17 | 10 | 25 | 000000000 | 0000 |
| M12 | 1.25 | 19 | 12 | 5 | 000000000 | 00000 |
| M12 | 1.75 | 19 | 12 | 10 | 000000000 | 0000 |
| M14 | 2 | 22 | 14 | 10 | 000000000 | 0000 |
| M16 | 2 | 24 | 16 | 10 | 000000000 | 0000 |
| M18 | 2.5 | 27 | 18 | 5 | 000000000 | 0000 |
| M20 | 2.5 | 30 | 20 | 5 | 000000000 | 0000 |
| M24 | 3 | 36 | 24 | 1 | 000000000 | 0000 |
| M30 | 3.5 | 46 | 30 | 1 | 000000000 | 0000 |
Metric Medium-Strength Steel Top-Lock
Distorted-Thread Locknuts—Class 8
An irregularly shaped thread at the top of the nut grips the bolt for a stronger hold than nylon-insert locknuts. They thread on from the bottom of the nut, allowing more threads to engage the bolt before tightening for easier installation than center-lock distorted thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. They're not reusable. Comparable in strength to Class 8.8 bolts, they're suitable for fastening most machinery and equipment. A zinc or zinc yellow-chromate plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||
|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Class 8 | |||||||
| M36 | 4 | 55 | 36 | DIN 980V | 1 | 000000000 | 00000 |
High-Strength Steel Center-Lock
Distorted-Thread Locknuts—Grade 8
These locknuts have an irregularly shaped thread in the middle of the nut that grips the bolt for a stronger hold than nylon-insert locknuts. Also known as reversible locknuts, they can be threaded on from either end. They're about three times stronger than low-strength steel locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. They're not reusable.
Zinc yellow-chromate plated steel locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Grade 8 | |||||
|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 7/32" | 50 | 000000000 | 000000 |
| 1/4"-28 | 7/16" | 7/32" | 50 | 000000000 | 00000 |
| 5/16"-18 | 1/2" | 17/64" | 50 | 000000000 | 00000 |
| 5/16"-24 | 1/2" | 17/64" | 50 | 000000000 | 00000 |
| 3/8"-16 | 9/16" | 21/64" | 25 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 21/64" | 25 | 000000000 | 0000 |
| 7/16"-14 | 11/16" | 3/8" | 10 | 000000000 | 0000 |
| 7/16"-20 | 11/16" | 3/8" | 10 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 7/16" | 10 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 7/16" | 10 | 000000000 | 0000 |
| 9/16"-12 | 7/8" | 31/64" | 10 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 35/64" | 5 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 35/64" | 5 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 41/64" | 5 | 000000000 | 0000 |
| 3/4"-16 | 1 1/8" | 41/64" | 5 | 000000000 | 0000 |
| 7/8"-9 | 1 5/16" | 3/4" | 5 | 000000000 | 00000 |
| 1"-8 | 1 1/2" | 55/64" | 1 | 000000000 | 0000 |
| 1"-14 | 1 1/2" | 55/64" | 1 | 000000000 | 0000 |
High-Strength Steel Extra-Wide Steel-Insert
Locknuts for Extreme Vibration—Grade 8
These locknuts are about 10% wider and taller than standard steel-insert locknuts. They distribute the load over a large area. When installed, the steel insert grips the threads and lifts away from the nut body, isolating the insert from the nut’s load to resist spinoff caused by vibration. They're often used in shakers and vibrating equipment. The strength of the bolt should match the strength of the nut to prevent damaging threads. Made from Grade 8 steel, they're about 25% stronger than medium-strength steel locknuts.
Zinc yellow-chromate plated steel locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Each | |
Zinc Yellow-Chromate Plated Steel—Grade 8 | ||||
|---|---|---|---|---|
| 1/2"-13 | 7/8" | 19/32" | 000000000 | 00000 |
| 5/8"-11 | 1 1/16" | 47/64" | 000000000 | 0000 |
| 3/4"-10 | 1 1/4" | 57/64" | 000000000 | 0000 |
| 7/8"-9 | 1 7/16" | 1 1/32" | 000000000 | 0000 |
| 1"-8 | 1 5/8" | 1 11/64" | 000000000 | 00000 |
| 1 1/8"-7 | 1 13/16" | 1 21/64" | 000000000 | 00000 |
| 1 1/4"-7 | 2" | 1 29/64" | 000000000 | 00000 |
| 1 1/2"-6 | 2 3/8" | 1 47/64" | 000000000 | 00000 |
| 2"-4 1/2 | 3 1/8" | 2 11/32" | 000000000 | 00000 |
High-Strength Steel Serrated Flange Locknuts—Grade 8
Serrations grip the material surface instead of the threads for easy installation and mild vibration resistance. The flange distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. They're about 25% stronger than medium-strength steel flange locknuts. Height includes the flange.
Zinc-plated steel flange locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Flange | |||||||
|---|---|---|---|---|---|---|---|
| Thread Size | Wd. | Ht. | Dia. | Thick. | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Grade 8 | |||||||
| 9/16"-12 | 7/8" | 1/2" | 1 3/16" | 0.05" | 5 | 000000000 | 00000 |
High-Strength Steel Nylon-Insert
Flange Locknuts—Grade G
These locknuts have a nylon insert that firmly grips threads to resist loosening and a flange that distributes the load over a large area. They’re reusable, but their holding power lessens with each use. Made from Grade G steel, they're about 25% stronger than medium-strength steel flange locknuts and are comparable in strength to Grade 8 bolts. A zinc-yellow chromate plating provides corrosion resistance in wet environments. Height includes the flange.
For technical drawings and 3-D models, click on a part number.
Flange | ||||||||
|---|---|---|---|---|---|---|---|---|
| Thread Size | Wd. | Ht. | Dia. | Thick. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Grade G | ||||||||
| 1/4"-20 | 7/16" | 19/64" | 0.56" | 0.04" | 250° | 100 | 000000000 | 00000 |
| 5/16"-18 | 1/2" | 11/32" | 0.68" | 0.05" | 250° | 50 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 13/32" | 0.81" | 0.06" | 250° | 50 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 35/64" | 1.07" | 0.08" | 250° | 25 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 43/64" | 1.33" | 0.1" | 250° | 10 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 13/16" | 1.585" | 0.11" | 250° | 5 | 000000000 | 0000 |
Metric High-Strength Steel Nylon-Insert
Flange Locknuts—Class 10
A nylon insert firmly grips threads to resist loosening and a flange distributes the load over a large area. They’re reusable, but their holding power lessens with each use. Made from Class 10 steel, they're about 25% stronger than medium-strength steel flange nuts and comparable in strength to Class 10.9 bolts. They have a zinc or zinc-yellow-chromate plating to resist corrosion in wet environments. Height includes the flange.
For technical drawings and 3-D models, click on a part number.
Thread | Flange | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Wd., mm | Ht., mm | Dia., mm | Thick., mm | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Class 10 | ||||||||||
| M6 | 1 | 10 | 9.1 | 14.2 | 1.1 | 250° | DIN 6926 | 50 | 000000000 | 000000 |
| M8 | 1.25 | 13 | 11 | 17.9 | 1.2 | 250° | DIN 6926 | 50 | 000000000 | 00000 |
| M10 | 1.5 | 15 | 13.5 | 21.8 | 1.5 | 250° | DIN 6926 | 25 | 000000000 | 00000 |
| M12 | 1.75 | 18 | 16.1 | 26 | 1.8 | 250° | DIN 6926 | 25 | 000000000 | 00000 |
| M14 | 2 | 21 | 18.2 | 29.9 | 2.1 | 250° | DIN 6926 | 10 | 000000000 | 00000 |
| M16 | 2 | 24 | 20.3 | 34.5 | 2.4 | 250° | DIN 6926 | 5 | 000000000 | 00000 |
| M20 | 2.5 | 30 | 24.8 | 42.8 | 3 | 250° | DIN 6926 | 1 | 000000000 | 0000 |
High-Strength Steel Distorted-Thread Flange Locknuts
An irregularly-shaped thread grips the bolt for a stronger hold than nylon-insert flange locknuts. They have a flange that distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. Grade G locknuts are comparable in strength to Grade 8 bolts. Height includes the flange.
Zinc yellow-chromate plated steel locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Flange | |||||||
|---|---|---|---|---|---|---|---|
| Thread Size | Wd. | Ht. | Dia. | Thick. | Pkg. Qty. | Pkg. | |
Zinc Yellow-Chromate Plated Steel—Grade G | |||||||
| 1/4"-20 | 7/16" | 19/64" | 9/16" | 0.04" | 50 | 000000000 | 00000 |
| 1/4"-28 | 7/16" | 19/64" | 9/16" | 0.04" | 50 | 000000000 | 00000 |
| 5/16"-18 | 1/2" | 23/64" | 11/16" | 0.05" | 25 | 000000000 | 00000 |
| 5/16"-24 | 1/2" | 23/64" | 11/16" | 0.05" | 25 | 000000000 | 00000 |
| 3/8"-16 | 9/16" | 27/64" | 13/16" | 0.06" | 25 | 000000000 | 00000 |
| 3/8"-24 | 9/16" | 27/64" | 13/16" | 0.06" | 25 | 000000000 | 00000 |
| 1/2"-13 | 3/4" | 9/16" | 1 1/16" | 0.08" | 10 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 9/16" | 1 1/16" | 0.08" | 10 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 11/16" | 1 21/64" | 0.1" | 10 | 000000000 | 00000 |
| 5/8"-18 | 15/16" | 11/16" | 1 21/64" | 0.1" | 10 | 000000000 | 00000 |
| 3/4"-10 | 1 1/8" | 13/16" | 1 37/64" | 0.11" | 5 | 000000000 | 00000 |