The Washer,flat, cataloged under National Stock Number 5310-01-709-0253, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-709-0253 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Material Type | BRASS |
| Overall Diameter | 0.450 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN |
| Hardness Rating | 57.0 ROCKWELL B MINIMUM AND 77.0 ROCKWELL B MAXIMUM |
| Material Document and Classification | ASTM-B36 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ALL MATERIAL RESPONSES AND ASTM-B121. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ALL MATERIAL RESPONSES OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Specification/standard Data | 96906-MS51496 GOVERNMENT SPECIFICATION |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY 280 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.260 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN |
| Thickness | 0.029 INCHES MINIMUM AND 0.032 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 |
|---|---|
| MS51496-55 | 2/2 Government specification standardization U.S. Government activity |
| MS51496B | 4/1 Identification reference U.S. Government activity |
NSN 5310-01-709-0253 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-709-0253: Material Type: BRASS; Overall Diameter: 0.450 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN; Hardness Rating: 57.0 ROCKWELL B MINIMUM AND 77.0 ROCKWELL B MAXIMUM; Material Document and Classification: ASTM-B36 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ALL MATERIAL RESPONSES AND ASTM-B121. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ALL MATERIAL RESPONSES OVERALL. 11 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.