The Washer,recessed, cataloged under National Stock Number 5310-01-040-9908, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-040-9908 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | RECESSED |
| Material Document and Classification | MIL-S-6721 TYPE 321 OR 347 MIL SPEC 1ST MATERIAL RESPONSE OR QQ-S-763 CLASS 321 OR 347 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.437 INCHES NOMINAL IN |
| Material Thickness | 0.078 INCHES NOMINAL IN |
| Specification/standard Data | 80205-NAS1587 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Recess Diameter | 1.015 INCHES MINIMUM AND 1.035 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.884 INCHES MINIMUM AND 0.897 INCHES MAXIMUM 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 |
| Reference | Meaning |
|---|---|
| 10122021 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| NAS1587-14C | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-040-9908 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-040-9908: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: RECESSED; Material Document and Classification: MIL-S-6721 TYPE 321 OR 347 MIL SPEC 1ST MATERIAL RESPONSE OR QQ-S-763 CLASS 321 OR 347 FED SPEC 2ND MATERIAL RESPONSE OVERALL; Outside Diameter: 1.437 INCHES NOMINAL IN. 11 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.