The Washer,flat, cataloged under National Stock Number 5310-00-536-9957, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-536-9957 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Overall Diameter | 0.185 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM B103-51 ASSN STD 1ST MATERIAL RESPONSE OR 00-C-533 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-766 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-766 FED SPEC 3RD MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY OR STEEL COMP 302 OR STEEL COMP 304 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.126 INCHES MINIMUM AND 0.129 INCHES MAXIMUM IN |
| Thickness | 0.014 INCHES MINIMUM AND 0.016 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 |
|---|---|
| 79279400204 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-536-9957 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-536-9957: Overall Diameter: 0.185 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN; Material Document and Classification: ASTM B103-51 ASSN STD 1ST MATERIAL RESPONSE OR 00-C-533 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-766 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-766 FED SPEC 3RD MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: PASSIVATE OVERALL. 9 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.