The Washer,recessed, cataloged under National Stock Number 5310-01-591-7418, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-591-7418 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Style Designator | RECESSED |
| Outside Diameter | 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN |
| Recess Depth | 0.037 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN |
| Recess Diameter | 0.435 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 0.302 INCHES MINIMUM AND 0.306 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 |
|---|---|
| 767040-9 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-591-7418 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5305-01-652-3381, 5310-01-652-3450. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-591-7418: Overall Height: 0.183 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN; Style Designator: RECESSED; Outside Diameter: 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN; Recess Depth: 0.037 INCHES MINIMUM AND 0.039 INCHES MAXIMUM IN. 7 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.