The Washer,recessed, cataloged under National Stock Number 5310-01-340-0246, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-340-0246 |
| 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 |
| Hardness Rating | 56.0 ROCKWELL C MINIMUM |
| Style Designator | RECESSED |
| Material Document and Classification | AMS 5618 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5630 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.602 INCHES MINIMUM AND 0.612 INCHES MAXIMUM IN |
| Recess Depth | 0.1002 INCHES MINIMUM AND 0.1198 INCHES MAXIMUM IN |
| Material Thickness | 0.073 INCHES MINIMUM AND 0.077 INCHES MAXIMUM IN |
| Recess Diameter | 0.537 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 440C OVERALL |
| Hole Diameter | 0.4368 INCHES MINIMUM AND 0.4372 INCHES MAXIMUM IN |
| Recess Angle | 88.0 DEGREES MINIMUM AND 92.0 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 |
|---|---|
| 748974 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-340-0246 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-340-0246: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Hardness Rating: 56.0 ROCKWELL C MINIMUM; Style Designator: RECESSED; Material Document and Classification: AMS 5618 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5630 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 12 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.