The Washer,recessed, cataloged under National Stock Number 5310-01-260-4937, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-260-4937 |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-Z-325,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Heat Treatment | COLD ROLLED AND TEMPER, CONDITION 1 |
| Hardness Rating | 85.0 ROCKWELL B MINIMUM |
| Style Designator | RECESSED |
| Material Document and Classification | ASTM A109 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.500 INCHES NOMINAL IN |
| Material Thickness | 0.021 INCHES NOMINAL IN |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.120 INCHES MINIMUM AND 0.129 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 | X |
| Reference | Meaning |
|---|---|
| 101301104 | 3/2 Design control — primary reference U.S. Government activity |
| 12277389 | 3/1 Design control — primary reference U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5310-01-260-4937 is a Washer,recessed, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-260-4937: Surface Treatment Document and Classification: QQ-Z-325,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Heat Treatment: COLD ROLLED AND TEMPER, CONDITION 1; Hardness Rating: 85.0 ROCKWELL B MINIMUM; Style Designator: RECESSED. 10 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.