The Washer,recessed, cataloged under National Stock Number 5310-00-279-9083, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-279-9083 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES TOP |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | RECESSED |
| Material Document and Classification | MIL-S-6721 MIL SPEC ALL MATERIAL RESPONSES OR QQ-S-763 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Outside Diameter | 0.781 INCHES NOMINAL IN |
| Material Thickness | 0.078 INCHES NOMINAL IN |
| Specification/standard Data | 80205-NAS1587 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Recess Diameter | 0.543 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 321 OR STEEL COMP 347 OVERALL |
| Hole Diameter | 0.441 INCHES MINIMUM AND 0.451 INCHES MAXIMUM IN |
| Recess Angle | 90.0 DEGREES NOMINAL |
| 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 |
|---|---|
| 10121255 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| NAS1587-7C | 3/2 Design control — primary reference U.S. Government activity |
| 30005070 ITEM 73 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-279-9083 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-279-9083: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: RECESSED. 13 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.