The Washer,concave, cataloged under National Stock Number 5310-01-368-8071, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-368-8071 |
| Item Name | Washer,concave |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Surface Treatment Document and Classification | ASTM B633 TY 2,CL FE/ZN 13 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Radius | 18.5 MILLIMETERS NOMINAL MM |
| Hardness Rating | 88.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM |
| Style Designator | CONCAVE |
| Outside Diameter | 20.8 MILLIMETERS MINIMUM AND 21.0 MILLIMETERS MAXIMUM MM |
| Material Thickness | 4.2 MILLIMETERS NOMINAL MM |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Material | STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1012 OR STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL |
| Hole Diameter | 12.0 MILLIMETERS MINIMUM AND 12.1 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| D0D-W-63546/8-23G | 5/9 Secondary reference U.S. Government activity |
| D63546/8-23G | 2/2 Government specification standardization U.S. Government activity |
| D0D-W-D63546/8 | 4/1 Identification reference U.S. Government activity |
| 12917084 | 5/1 Secondary reference Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
NSN 5310-01-368-8071 is a Washer,concave, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-368-8071: Surface Treatment Document and Classification: ASTM B633 TY 2,CL FE/ZN 13 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Radius: 18.5 MILLIMETERS NOMINAL MM; Hardness Rating: 88.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM; Style Designator: CONCAVE. 9 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.