System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Thread Size Thread Size | Hide |
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Nut Type Nut Type | Show |
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 | Locknut |
Locking Type Locking Type |
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| Nylon Insert | Cotter Pin |
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| Steel Insert |
Hex Nut Profile Hex Nut Profile |
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| Standard | Extra-Wide Thin |
Material Material |
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Thread Direction Thread Direction |
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Fastener Strength Grade/Class Fastener StrengthGrade/Class |
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Thread Spacing Thread Spacing |
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Thread Type Thread Type |
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Drive Style Drive Style |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Thread Fit Thread Fit |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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For Cotter Pin Diameter For Cotter Pin Diameter |
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Minimum Slot Depth Minimum Slot Depth |
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Minimum Slot Width Minimum Slot Width |
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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.
Steel locknuts without a finish are ready to be painted or finished.
Black-oxide steel locknuts have a dark surface color and are mildly corrosion resistant in dry environments.
Zinc yellow-chromate plated steel locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
High-Strength Steel Extra-Wide Thin Nylon-Insert Locknuts
About half the height and 10% wider than standard nylon-insert locknuts, use these in low-clearance applications or jam one against an extra-wide hex nut to hold it in place. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use. Comparable in strength to Grade 8 bolts, these locknuts are about three times stronger than low-strength steel extra-wide thin locknuts.
Black-phosphate 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 | Each | |
Black-Phosphate Steel—ASTM Grade C | |||||
|---|---|---|---|---|---|
| 2"-12 | 3 1/8" | 1 43/64" | 250° | 000000000 | 000000 |
Low-Strength Steel Locknuts for use with Cotter Pins
Secure these hex slotted nuts by inserting a cotter pin or safety wire through the slots and a drilled hole in your bolt for mild loosening resistance. They’re not recommended for use on parts exposed to high vibration because the pin is prone to shearing under prolonged stress. Height includes the slots. Cotter pins are not included. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | For Cotter Pin Dia. | Min. Slot Wd. | Min. Slot Dp. | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 2"-12 | 3" | 1 23/32" | 3/8" | 0.43" | 0.485" | 1 | 000000000 | 000000 |
Steel-Insert Locknuts for Extreme Vibration—Grade 5
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. These locknuts are 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 5 steel, they're suitable for fastening most machinery and equipment.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Each | |
Steel—Grade 5 | ||||
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| 2"-12 | 3" | 2" | 000000000 | 0000000 |