The Washer,recessed, cataloged under National Stock Number 5310-01-293-5333, 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13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-293-5333 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES BOTTOM |
| Surface Finish | 32.0 MICROINCHES TOP |
| Top Recess Diameter | 0.421 INCHES MINIMUM AND 0.462 INCHES MAXIMUM IN |
| Bottom Recess Diameter | 0.421 INCHES MINIMUM AND 0.462 INCHES MAXIMUM IN |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 64.0 ROCKWELL C MAXIMUM |
| Top Recess Angle | 90.0 DEGREES NOMINAL |
| Style Designator | RECESSED BOTH SIDES |
| Material Document and Classification | MIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE OR AMS 6440 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.775 INCHES MINIMUM AND 0.815 INCHES MAXIMUM IN |
| Material Thickness | 0.178 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| Bottom Recess Angle | 90.0 DEGREES NOMINAL |
| Material | STEEL COMP E52100 OVERALL |
| Hole Diameter | 0.401 INCHES MINIMUM AND 0.402 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 |
|---|---|
| 3862408-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-293-5333 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-293-5333: Surface Finish: 32.0 MICROINCHES BOTTOM; Surface Finish: 32.0 MICROINCHES TOP; Top Recess Diameter: 0.421 INCHES MINIMUM AND 0.462 INCHES MAXIMUM IN; Bottom Recess Diameter: 0.421 INCHES MINIMUM AND 0.462 INCHES MAXIMUM IN. 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.