The Washer,recessed, cataloged under National Stock Number 5310-01-340-5385, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-340-5385 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Outside Diameter | 3.090 INCHES MINIMUM AND 3.150 INCHES MAXIMUM IN |
| Material Thickness | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Recess Diameter | 2.740 INCHES MINIMUM AND 2.760 INCHES MAXIMUM IN |
| Surface Treatment | CHROMATE OVERALL |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Diameter | 2.380 INCHES MINIMUM AND 2.440 INCHES MAXIMUM IN |
| Recess Angle | 45.0 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 |
|---|---|
| 9036063 | 5/9 Secondary reference U.S. Government activity |
| 9036063-01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-340-5385 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-340-5385: Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Outside Diameter: 3.090 INCHES MINIMUM AND 3.150 INCHES MAXIMUM IN; Material Thickness: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN; Recess Diameter: 2.740 INCHES MINIMUM AND 2.760 INCHES MAXIMUM IN. 8 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.