The Washer,shouldered, cataloged under National Stock Number 5310-00-321-4677, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-321-4677 |
| Item Name | Washer,shouldered |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Shoulder Height | 0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN |
| Style Designator | SHOULDERED |
| Material Document and Classification | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.528 INCHES MINIMUM AND 0.529 INCHES MAXIMUM IN |
| Material Thickness | 0.033 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| Material | STEEL COMP 303 OVERALL |
| Hole Diameter | 0.251 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 365279-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-321-4677 is a Washer,shouldered, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5940-00-417-3541. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-321-4677: Shoulder Height: 0.013 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN; Style Designator: SHOULDERED; Material Document and Classification: QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.528 INCHES MINIMUM AND 0.529 INCHES MAXIMUM IN. 8 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.