The Washer,flat, cataloged under National Stock Number 5310-01-449-0628, 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11 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-449-0628 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES ALL SURFACES |
| Surface Treatment Document and Classification | ASTM B633 TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.961 INCHES MINIMUM AND 0.983 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A 108 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A109 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1008 OR STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1137 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.276 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN |
| Thickness | 0.036 INCHES MINIMUM AND 0.065 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 |
|---|---|
| MS51412-36 | 2/2 Government specification standardization U.S. Government activity |
| 5310PL0725766 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS1412-36 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-449-0628 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-449-0628: Surface Finish: 125.0 MICROINCHES ALL SURFACES; Surface Treatment Document and Classification: ASTM B633 TYPE 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.961 INCHES MINIMUM AND 0.983 INCHES MAXIMUM IN; Material Document and Classification: ASTM A 108 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A109 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.