The Washer,flat, cataloged under National Stock Number 5310-01-481-2079, 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10 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-481-2079 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES BOTTOM |
| Surface Finish | 125.0 MICROINCHES TOP |
| Overall Diameter | 3.375 INCHES NOMINAL IN |
| Material Document and Classification | MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.641 INCHES NOMINAL IN |
| Thickness | 0.188 INCHES NOMINAL 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 |
|---|---|
| 124-1678550 PC 19 | 5/2 Secondary reference U.S. Government activity |
| 124-1678549 PC 79 | 3/2 Design control — primary reference U.S. Government activity |
| 1678550 | D/9 Drawing number reference only U.S. Government activity |
NSN 5310-01-481-2079 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-481-2079: Surface Finish: 125.0 MICROINCHES BOTTOM; Surface Finish: 125.0 MICROINCHES TOP; Overall Diameter: 3.375 INCHES NOMINAL IN; Material Document and Classification: MIL-B-24059 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.