The Washer,recessed, cataloged under National Stock Number 5310-00-986-9971, 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11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-986-9971 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES OUTER |
| Surface Finish | 63.0 MICROINCHES TOP |
| Heat Treatment | STRESS RELIEVED |
| Hardness Rating | 23.0 ROCKWELL C MAXIMUM |
| Style Designator | RECESSED |
| Material Document and Classification | AMS6382 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.814 INCHES MINIMUM AND 1.815 INCHES MAXIMUM IN |
| Recess Depth | 0.470 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN |
| Material Thickness | 0.112 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 1.440 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 |
|---|---|
| 2-080-004-03 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-986-9971 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-986-9971: Surface Finish: 32.0 MICROINCHES OUTER; Surface Finish: 63.0 MICROINCHES TOP; Overall Height: 0.510 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN; Heat Treatment: STRESS RELIEVED. 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.