The Washer,flat, cataloged under National Stock Number 5310-00-286-0429, 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11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-286-0429 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Center Hole Width | 0.310 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN |
| Center Hole Length | 0.310 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE AND PRIMER TT-P-1757 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.680 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-250/8,H32 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CHROMATE AND ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | ALUMINUM ALLOY 5052 OVERALL |
| Center Hole Shape Style | RECTANGULAR |
| Thickness | 0.052 INCHES MINIMUM AND 0.062 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 |
|---|---|
| SMB500792 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-286-0429 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-286-0429: Center Hole Width: 0.310 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN; Center Hole Length: 0.310 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC 1ST TREATMENT RESPONSE AND PRIMER TT-P-1757 FED SPEC 2ND TREATMENT RESPONSE OVERALL; Overall Diameter: 0.680 INCHES NOMINAL IN. 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.