The Washer,recessed, cataloged under National Stock Number 5310-01-502-7161, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-502-7161 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Special Test Features | FLUORESCENT PENETRANT INSPECTION PER AMS 2645 |
| Supplementary Features | CONTROLLING AGENCY NOMENCLATURE WASHER, CUP LOCK-SPANNER NUT |
| Hardness Rating | 140.0 BRINELL HULTGREN MINIMUM AND 220.0 BRINELL HULTGREN MAXIMUM |
| Style Designator | RECESSED |
| Material Document and Classification | AMS 5646 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 2.197 INCHES MINIMUM AND 2.210 INCHES MAXIMUM IN |
| Recess Depth | 0.465 INCHES MINIMUM AND 0.476 INCHES MAXIMUM IN |
| Material Thickness | 0.033 INCHES MINIMUM AND 0.038 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Diameter | 1.753 INCHES MINIMUM AND 1.763 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 |
|---|---|
| MS9952-24 | 2/2 Government specification standardization U.S. Government activity |
| MS9952-24 | 5/1 Secondary reference Rolls-Royce Corporation |
NSN 5310-01-502-7161 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-502-7161: Overall Height: 0.362 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN; Special Test Features: FLUORESCENT PENETRANT INSPECTION PER AMS 2645; Supplementary Features: CONTROLLING AGENCY NOMENCLATURE WASHER, CUP LOCK-SPANNER NUT; Hardness Rating: 140.0 BRINELL HULTGREN MINIMUM AND 220.0 BRINELL HULTGREN MAXIMUM. 10 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.