The Washer,flat, cataloged under National Stock Number 5310-01-480-4144, 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11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-480-4144 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES ALL SURFACES |
| Surface Finish | 125.0 MICROINCHES OUTER |
| Surface Finish | 125.0 MICROINCHES INNER |
| Overall Diameter | 4.000 INCHES NOMINAL IN |
| Material Document and Classification | QQ-B-728,CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | COPPER ALLOY 675 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 2.000 INCHES MINIMUM AND 2.030 INCHES MAXIMUM IN |
| Thickness | 0.125 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 |
|---|---|
| 122-2422337 PIECE 18 | 3/2 Design control — primary reference U.S. Government activity |
| 2422337 | D/9 Drawing number reference only U.S. Government activity |
NSN 5310-01-480-4144 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5310-01-480-4736. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-480-4144: Surface Finish: 63.0 MICROINCHES ALL SURFACES; Surface Finish: 125.0 MICROINCHES OUTER; Surface Finish: 125.0 MICROINCHES INNER; Overall Diameter: 4.000 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.