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Material Material | Show |
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System of Measurement System of Measurement |
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Specifications Met Specifications Met |
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Locking Type Locking Type |
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 | Distorted Thread |
Hex Nut Profile Hex Nut Profile |
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 | Standard |
Finish Finish |
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Distorted Thread Type Distorted Thread Type |
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 | Center Lock |
Thread Fit Thread Fit |
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Thread Direction Thread Direction |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Drive Style Drive Style |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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About Nuts, Materials, and Finishes
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Stainless Steel Distorted-Thread Flange Locknuts
These flange locknuts have excellent resistance to chemicals and salt water. They have an irregularly shaped thread that grips the bolt for a stronger hold than nylon-insert flange locknuts. A flange distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. These nuts may be mildly magnetic. Height includes the flange.
A286 stainless steel nuts cannot be reused. Those with lubricant thread onto bolts smoothly.
For technical drawings and 3-D models, click on a part number.
Flange | ||||||||
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| Thread Size | Wd. | Ht. | Dia. | Thick. | Specifications Met | Pkg. Qty. | Pkg. | |
Silver-Plated A286 Stainless Steel | ||||||||
| 4-40 | 5/32" | 1/8" | 0.206" | 0.03" | MS21043-04 | 5 | 000000000 | 000000 |
| 6-32 | 3/16" | 9/64" | 0.244" | 0.03" | MS21043-06 | 5 | 000000000 | 0000 |
| 8-32 | 7/32" | 3/16" | 0.29" | 0.03" | MS21043-08 | 5 | 000000000 | 00000 |
| 10-32 | 1/4" | 3/16" | 0.33" | 0.03" | MS21043-3 | 5 | 000000000 | 0000 |
| 1/4"-28 | 5/16" | 7/32" | 0.42" | 0.04" | MS21043-4 | 5 | 000000000 | 0000 |
| 5/16"-24 | 3/8" | 17/64" | 0.52" | 0.04" | MS21043-5 | 1 | 000000000 | 0000 |
| 3/8"-24 | 7/16" | 9/32" | 0.62" | 0.04" | MS21043-6 | 1 | 000000000 | 0000 |
A286 Stainless Steel with Lubricant | ||||||||
| 2-56 | 1/8" | 3/32" | 0.167" | 0.01" | NAS1291C02M | 5 | 000000000 | 00000 |
| 4-40 | 5/32" | 1/8" | 0.206" | 0.01" | NAS1291C04M | 1 | 000000000 | 0000 |
| 6-32 | 3/16" | 9/64" | 0.244" | 0.01" | NAS1291C06M | 1 | 000000000 | 0000 |
| 8-32 | 7/32" | 3/16" | 0.29" | 0.02" | NAS1291C08M | 1 | 000000000 | 0000 |
| 10-32 | 1/4" | 3/16" | 0.33" | 0.02" | NAS1291C3M | 1 | 000000000 | 0000 |
| 1/4"-28 | 5/16" | 7/32" | 0.42" | 0.02" | NAS1291C4M | 1 | 000000000 | 0000 |
| 5/16"-24 | 3/8" | 17/64" | 0.52" | 0.03" | NAS1291C5M | 1 | 000000000 | 0000 |
| 3/8"-24 | 7/16" | 9/32" | 0.62" | 0.03" | NAS1291C6M | 1 | 000000000 | 00000 |
| 7/16"-20 | 1/2" | 21/64" | 0.708" | 0.04" | NAS1291C7M | 1 | 000000000 | 00000 |
| 1/2"-20 | 9/16" | 13/32" | 0.814" | 0.04" | NAS1291C8M | 1 | 000000000 | 00000 |