The Washer,recessed, cataloged under National Stock Number 5310-01-057-3115, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-057-3115 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE II,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-A-225/6,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.495 INCHES MINIMUM AND 0.498 INCHES MAXIMUM IN |
| Recess Depth | 0.032 INCHES MINIMUM AND 0.035 INCHES MAXIMUM IN |
| Recess Diameter | 0.380 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Diameter | 0.120 INCHES MINIMUM AND 0.130 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 |
|---|---|
| 11019-1 | 3/2 Design control — primary reference U.S. Government activity |
| 5310PL0787255 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5310-01-057-3115 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 2530-01-358-6041, 6150-01-395-0660. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-01-057-3115: Overall Height: 0.062 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-A-8625,TYPE II,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: RECESSED; Material Document and Classification: QQ-A-225/6,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 9 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.