The Washer,recessed, cataloged under National Stock Number 5310-01-137-8994, 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11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-137-8994 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A8625,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM |
| Style Designator | RECESSED |
| Outside Diameter | 0.440 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN |
| Material Thickness | 0.057 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN |
| Specification/standard Data | 81205-BACW10CT MANUFACTURERS STANDARD |
| Recess Diameter | 0.300 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM ALLOY OR ANODIZE OVERALL |
| Material | STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 4135 OVERALL |
| Hole Diameter | 0.253 INCHES MINIMUM AND 0.257 INCHES MAXIMUM IN |
| Recess Angle | 0.080 DEGREES MINIMUM AND 0.100 DEGREES MAXIMUM |
| 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 |
|---|---|
| BACW10CT8 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-137-8994 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-137-8994: Surface Treatment Document and Classification: MIL-A8625,TY 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM; Style Designator: RECESSED; Outside Diameter: 0.440 INCHES MINIMUM AND 0.460 INCHES MAXIMUM 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.