The Washer,flat, cataloged under National Stock Number 5310-01-004-5025, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-004-5025 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Overall Diameter | 0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN |
| Hardness Rating | 45.0 SHORE DUROMETER A MINIMUM AND 55.0 SHORE DUROMETER A MAXIMUM |
| Material Document and Classification | ZZ-R-765,CL 1A,GR 50 FED SPEC SINGLE MATERIAL RESPONSE OVERALL A |
| Cross-Sectional Shape Style | RECTANGULAR |
| Specification/standard Data | 80205-NAS1515 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Peripheral Shape Style | ROUND |
| Material | RUBBER SYNTHETIC OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.255 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN |
| Thickness | 0.084 INCHES MINIMUM AND 0.104 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 |
|---|---|
| 5310PL0739860 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| NAS1515B4H | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-004-5025 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-004-5025: Overall Diameter: 0.495 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN; Hardness Rating: 45.0 SHORE DUROMETER A MINIMUM AND 55.0 SHORE DUROMETER A MAXIMUM; Material Document and Classification: ZZ-R-765,CL 1A,GR 50 FED SPEC SINGLE MATERIAL RESPONSE OVERALL A; Cross-Sectional Shape Style: RECTANGULAR. 10 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.