The Washer,concave, cataloged under National Stock Number 5310-01-341-3146, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Esna, Llc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-341-3146 |
| Primary Part Number | 4367-07 |
| Item Name | Washer,concave |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY1,CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Radius | 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN |
| Style Designator | CONCAVE |
| Outside Diameter | 0.860 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN |
| Material Thickness | 0.135 INCHES MINIMUM AND 0.165 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.547 INCHES MINIMUM AND 0.577 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 |
| Part Number | Manufacturer |
|---|---|
| 4367-07 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| 4367-07 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-341-3146 is a Washer,concave, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-341-3146 has 1 manufacturer part number on file: 4367-07 (Esna, Llc).
Key specifications for 4367-07: Surface Treatment Document and Classification: QQ-P-416,TY1,CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Radius: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN; Style Designator: CONCAVE; Outside Diameter: 0.860 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN. 8 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.