The Washer,flat, cataloged under National Stock Number 5310-01-666-7873, 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11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-666-7873 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM B633, TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.625 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A108 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A109 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Specification/standard Data | 80205-MS51412 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Surface Treatment | ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1020 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1019 OR STEEL COMP 1018 OR STEEL COMP 1010 OR STEEL COMP 1008 OR STEEL COMP 1137 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.375 INCHES NOMINAL IN |
| Thickness | 0.090 INCHES MINIMUM AND 0.114 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 |
|---|---|
| MS51412-26 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-666-7873 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-666-7873: Surface Treatment Document and Classification: ASTM B633, TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.625 INCHES NOMINAL IN; Material Document and Classification: ASTM A108 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A109 ASSN STD 2ND MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.