The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-00-797-1740, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-00-797-1740 |
| Item Name | Washer,shouldered and Recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 40.0 MICROINCHES TOP |
| Surface Finish | 100.0 MICROINCHES INNER |
| Surface Finish | 100.0 MICROINCHES COUNTERBORE WALL |
| Surface Finish | 100.0 MICROINCHES OUTER |
| Surface Finish | 100.0 MICROINCHES BOTTOM |
| Surface Finish | 100.0 MICROINCHES COUNTERBORE FACE |
| Surface Finish | 100.0 MICROINCHES SHOULDER FACE |
| Shoulder Height | 0.025 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN |
| Hardness Rating | 92.3 ROCKWELL B MINIMUM AND 26.0 ROCKWELL C MAXIMUM |
| Style Designator | SHOULDERED AND RECESSED |
| Material Document and Classification | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.820 INCHES NOMINAL IN |
| Material Thickness | 0.062 INCHES NOMINAL IN |
| Shoulder Diameter | 0.450 INCHES NOMINAL IN |
| Material | STEEL COMP 4130 OVERALL |
| Hole Diameter | 0.328 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 |
|---|---|
| K359250-15 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-797-1740 is a Washer,shouldered and Recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-797-1740: Surface Finish: 40.0 MICROINCHES TOP; Surface Finish: 100.0 MICROINCHES INNER; Surface Finish: 100.0 MICROINCHES COUNTERBORE WALL; Surface Finish: 100.0 MICROINCHES OUTER. 16 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.