The Nut,plain,extended Washer,hexago, cataloged under National Stock Number 5310-01-081-8943, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-081-8943 |
| Item Name | Nut,plain,extended Washer,hexago |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Washer Outside Diameter | 0.641 INCHES MINIMUM AND 0.671 INCHES MAXIMUM IN |
| Width Across Flats | 0.423 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN |
| Thread Series | UNF |
| Washer Thickness | 0.007 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 1050 WASHER |
| Material | STEEL COMP 1020 NUT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 456758-2 | 7/2 Vendor item drawing reference Raytheon Company Dba Raytheon Co |
| 534-250800-52-0242B-0542B | 3/9 Design control — primary reference Itw Shakeproof Automotive Products |
| 456758-2 | 5/9 Secondary reference Raytheon Company Div Corp |
NSN 5310-01-081-8943 is a Nut,plain,extended Washer,hexago, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-081-8943: Overall Height: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN; Washer Outside Diameter: 0.641 INCHES MINIMUM AND 0.671 INCHES MAXIMUM IN; Width Across Flats: 0.423 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN; Thread Series: UNF. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.