The Washer,flat, cataloged under National Stock Number 5310-01-543-5902, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-543-5902 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES ALL SURFACES |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 630 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.190 INCHES MINIMUM AND 0.194 INCHES MAXIMUM IN |
| Thickness | 0.080 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 |
|---|---|
| 17P2A3302-29 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-543-5902 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-543-5902: Surface Finish: 125.0 MICROINCHES ALL SURFACES; Cross-Sectional Shape Style: RECTANGULAR; Special Features: ONE SIDE CUTAWAY/PROTUDING ON BOTH SIDE OF WASHER 0.320 IN. HEIGHT, CUTAWAY 0.180 IN WIDTH TO A DEPTH OF 0.145 IN; Surface Treatment: CADMIUM OVERALL. 8 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.