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| Nylon Insert | Flex-Top |
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About Nuts, Materials, and Finishes
More
18-8 Stainless Steel Extra-Wide Nylon-Insert Locknuts
These locknuts have good chemical resistance and may be mildly magnetic. About 10% wider and taller than standard nylon-insert locknuts, they distribute the load over a large area. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
| 1/4"-20 | 1/2" | 3/8" | 250° | 10 | 000000000 | 00000 |
| 5/16"-18 | 9/16" | 7/16" | 250° | 5 | 000000000 | 0000 |
| 3/8"-16 | 11/16" | 35/64" | 250° | 5 | 000000000 | 0000 |
| 1/2"-13 | 7/8" | 45/64" | 250° | 1 | 000000000 | 0000 |
| 5/8"-11 | 1 1/16" | 55/64" | 250° | 1 | 000000000 | 0000 |
| 3/4"-10 | 1 1/4" | 1" | 250° | 1 | 000000000 | 00000 |
| 7/8"-9 | 1 7/16" | 1 9/64" | Not Rated | 1 | 000000000 | 00000 |
| 1"-8 | 1 5/8" | 1 5/16" | Not Rated | 1 | 000000000 | 00000 |
Super-Corrosion-Resistant 316 Stainless
Steel Extra-Wide Nylon-Insert Locknuts
These locknuts have excellent resistance to chemicals and salt water. About 10% wider and taller than standard nylon-insert locknuts, they distribute the load over a large area. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use. Nuts may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
Steel Extra-Wide Nylon-Insert Locknuts
These locknuts are about 10% wider and taller than standard nylon-insert locknuts and distribute the load over a large area. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use. Use them in light duty fastening applications, such as securing access panels. 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. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||
|---|---|---|---|---|---|---|
| 1/4"-20 | 1/2" | 3/8" | 250° | 100 | 000000000 | 00000 |
| 5/16"-18 | 9/16" | 7/16" | 250° | 100 | 000000000 | 0000 |
| 3/8"-16 | 11/16" | 35/64" | 250° | 50 | 000000000 | 00000 |
| 7/16"-14 | 3/4" | 39/64" | Not Rated | 25 | 000000000 | 00000 |
| 1/2"-13 | 7/8" | 45/64" | 250° | 25 | 000000000 | 00000 |
| 9/16"-12 | 15/16" | 13/16" | Not Rated | 5 | 000000000 | 0000 |
| 5/8"-11 | 1 1/16" | 55/64" | 250° | 10 | 000000000 | 0000 |
| 3/4"-10 | 1 1/4" | 1" | 250° | 5 | 000000000 | 0000 |
| 7/8"-9 | 1 7/16" | 1 1/8" | 250° | 5 | 000000000 | 0000 |
| 1"-8 | 1 5/8" | 1 17/64" | 250° | 1 | 000000000 | 0000 |
| 1 1/4"-7 | 2" | 1 41/64" | 250° | 1 | 000000000 | 0000 |
| 1 1/2"-6 | 2 3/8" | 1 59/64" | 250° | 1 | 000000000 | 00000 |
Steel Extra-Wide Flex-Top Locknuts for Heavy Vibration
These locknuts are about 10% wider than standard flex-top locknuts to distribute the load over a large area. Threads at the top of the nut expand to grip the bolt on all sides for a stronger hold than distorted-thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. These locknuts have equivalent strength to Grade 8 steel locknuts. A cadmium plating provides corrosion resistance in wet environments and adds lubricity so they thread on smoothly.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Cadmium-Plated Steel | |||||
|---|---|---|---|---|---|
| 1/4"-20 | 1/2" | 19/64" | 10 | 000000000 | 00000 |
| 5/16"-18 | 9/16" | 21/64" | 10 | 000000000 | 0000 |
| 3/8"-16 | 5/8" | 25/64" | 10 | 000000000 | 00000 |
| 1/2"-13 | 13/16" | 1/2" | 5 | 000000000 | 00000 |
| 5/8"-11 | 1" | 41/64" | 1 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 49/64" | 1 | 000000000 | 0000 |
| 7/8"-9 | 1 5/16" | 57/64" | 1 | 000000000 | 0000 |
| 1"-8 | 1 1/2" | 1 1/64" | 1 | 000000000 | 00000 |
Stainless Steel Extra-Wide Flex-Top
Locknuts for Heavy Vibration
These locknuts have good chemical resistance and may be mildly magnetic. They're about 10% wider than standard flex-top locknuts. They distribute the load over a large area. Threads at the top of the nut expand to grip the bolt on all sides for a stronger hold than distorted-thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads.
For technical drawings and 3-D models, click on a part number.
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.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Each | |
Steel—Grade 8 | ||||
|---|---|---|---|---|
| 3/8"-16 | 11/16" | 13/32" | 000000000 | 00000 |
| 1/2"-13 | 7/8" | 37/64" | 000000000 | 0000 |
| 5/8"-11 | 1 1/16" | 47/64" | 000000000 | 0000 |
| 3/4"-10 | 1 1/4" | 7/8" | 000000000 | 0000 |
| 1"-8 | 1 5/8" | 1 11/64" | 000000000 | 00000 |
| 1 1/8"-7 | 1 13/16" | 1 17/64" | 000000000 | 00000 |
| 1 1/4"-7 | 2" | 1 13/32" | 000000000 | 00000 |
| 1 1/2"-6 | 2 3/8" | 1 11/16" | 000000000 | 00000 |
| 1 3/4"-5 | 2 3/4" | 2 1/32" | 000000000 | 00000 |
Medium-Strength Steel Extra-Wide Steel-Insert
Locknuts for Extreme Vibration—Grade 5
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 5 steel, they're suitable for fastening most machinery and equipment.
For technical drawings and 3-D models, click on a part number.