The Washer,concave, cataloged under National Stock Number 5310-01-648-3276, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is R.g.h. Associates, Inc. Dba Richards Screw Machine. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Washer,concave |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | R.g.h. Associates, Inc. Dba Richards Screw Machine (CAGE 2Y283) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-648-3276 |
| Primary Part Number | JSFW01-84V |
| Item Name | Washer,concave |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | R.g.h. Associates, Inc. Dba Richards Screw Machine |
| Status | ACTIVE |
| 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 |
|---|---|
| JSFW01-84V PRIMARY | R.g.h. Associates, Inc. Dba Richards Screw Machine (USA) |
| Reference | Meaning |
|---|---|
| JSFW01 | D/9 Drawing number reference only U.S. Government activity |
| JSFW01-84V | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5310-01-648-3276 is a Washer,concave, manufactured by R.g.h. Associates, Inc. Dba Richards Screw Machine, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-648-3276 has 1 manufacturer part number on file: JSFW01-84V (R.g.h. Associates, Inc. Dba Richards Screw Machine).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-648-3277. Verify interchangeability with system specifications before substitution.
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.