The Washer,flat, cataloged under National Stock Number 5310-01-049-0659, 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11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-049-0659 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES TOP |
| Overall Diameter | 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-5059,COND 1/4 HARD MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5059,COND 1/2 HARD MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5059,COND HARD MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5059,COND 1/4 HARD,FINISH NO. 2B MIL SPEC 2ND MATERIAL RESPONSE OR ASTM A582 ASSN STD 3RD MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Specification/standard Data | 70210-S8154 MANUFACTURERS STANDARD |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 303 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| Thickness | 0.022 INCHES MINIMUM AND 0.028 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 |
|---|---|
| S8154-275C025 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-049-0659 is a Washer,flat, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-049-0659: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; Overall Diameter: 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN; Material Document and Classification: MIL-S-5059,COND 1/4 HARD MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5059,COND 1/2 HARD MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5059,COND HARD MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5059,COND 1/4 HARD,FINISH NO. 2B MIL SPEC 2ND MATERIAL RESPONSE OR ASTM A582 ASSN STD 3RD 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.