The Washer,recessed, cataloged under National Stock Number 5310-01-031-8375, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-031-8375 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Top Recess Diameter | 0.488 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Bottom Recess Diameter | 0.488 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZW |
| Top Recess Angle | 90.0 DEGREES NOMINAL |
| Style Designator | RECESSED BOTH SIDES |
| Material Document and Classification | AISI 12L14 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.875 INCHES NOMINAL IN |
| Material Thickness | 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| Bottom Recess Angle | 90.0 DEGREES NOMINAL |
| Departure From Cited Document | AS DIFFERENTIATED BY SPECIAL QUALITY CONTROL TESTING FOR MK 48 TORPEDO |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE FILM OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.396 INCHES MINIMUM AND 0.416 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 | Y |
| Reference | Meaning |
|---|---|
| 2508835 | 3/1 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| PFW-375 | 5/1 Secondary reference U.S. Government activity |
NSN 5310-01-031-8375 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-031-8375: Top Recess Diameter: 0.488 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN; Bottom Recess Diameter: 0.488 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN; Criticality Code Justification: ZZZW; Top Recess Angle: 90.0 DEGREES NOMINAL. 14 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.