The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-671-5579, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-671-5579 |
| Primary Part Number | 4343452 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Washer Outside Diameter | 0.660 INCHES MINIMUM AND 0.680 INCHES MAXIMUM IN |
| Width Across Flats | 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Supplementary Features | SERRATED FLANGE |
| Washer Thickness | 0.040 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.310 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-01-671-5579 is a Nut,self-Locking,extended Washer, manufactured by Oshkosh Defense Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-671-5579 has 2 manufacturer part numbers on file: 4343452 (Oshkosh Defense Llc), 08870 (Havis, Inc.).
Key specifications for 4343452: Overall Height: 0.268 INCHES MINIMUM AND 0.283 INCHES MAXIMUM IN; Washer Outside Diameter: 0.660 INCHES MINIMUM AND 0.680 INCHES MAXIMUM IN; Width Across Flats: 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC). 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.