The Washer,round, cataloged under National Stock Number 5310-01-591-0148, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Charles Reed Knight Jr Dba Knight's Armament Company. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | Washer,round |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Charles Reed Knight Jr Dba Knight's Armament Company (CAGE 1S002) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-591-0148 |
| Primary Part Number | 20290 |
| Item Name | Washer,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Charles Reed Knight Jr Dba Knight's Armament Company |
| 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 |
|---|---|
| 20290 PRIMARY | Charles Reed Knight Jr Dba Knight's Armament Company (USA) |
NSN 5310-01-591-0148 is a Washer,round, manufactured by Charles Reed Knight Jr Dba Knight's Armament Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-591-0148 has 1 manufacturer part number on file: 20290 (Charles Reed Knight Jr Dba Knight's Armament Company).
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.