The Washer,recessed, cataloged under National Stock Number 5310-00-802-5906, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Raytheon Company. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-802-5906 |
| Primary Part Number | 8-51057 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Raytheon Company |
| Status | ACTIVE |
| Heat Treatment | T-4 SOLUTION HEAT TREATED, NATURAL AGED |
| Style Designator | RECESSED |
| Material Document and Classification | QQ-A-267 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.320 INCHES NOMINAL IN |
| Material Thickness | 0.125 INCHES NOMINAL IN |
| Recess Diameter | 1.190 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY OVERALL |
| Hole Diameter | 1.030 INCHES NOMINAL IN |
| Recess Angle | 90.0 DEGREES NOMINAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 8-51057 PRIMARY | Raytheon Company (USA) |
| Reference | Meaning |
|---|---|
| 8-51057 | 5/9 Secondary reference Hughes Missile Systems Co San Diego |
NSN 5310-00-802-5906 is a Washer,recessed, manufactured by Raytheon Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-802-5906 has 1 manufacturer part number on file: 8-51057 (Raytheon Company).
1 possible match (shared part number, not a government interchangeability claim): 5325-01-200-5850. Verify interchangeability with system specifications before substitution.
Key specifications for 8-51057: Heat Treatment: T-4 SOLUTION HEAT TREATED, NATURAL AGED; Style Designator: RECESSED; Material Document and Classification: QQ-A-267 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.320 INCHES NOMINAL IN. 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.