The Washer,flat, cataloged under National Stock Number 5310-01-561-4574, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Washer,flat |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc (CAGE 07679); Micro Plastics Inc (CAGE 13764) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-561-4574 |
| Primary Part Number | 17W04379B |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc |
| 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 |
|---|---|
| 17W04379B PRIMARY | Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc (USA) |
| 17W04379B PRIMARY | Micro Plastics Inc (USA) |
| Reference | Meaning |
|---|---|
| 206328 | D/9 Drawing number reference only Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service |
| 206328-01 | 7/2 Vendor item drawing reference Datapath, Inc. Dba Datapath Inc |
NSN 5310-01-561-4574 is a Washer,flat, manufactured by Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-561-4574 has 2 manufacturer part numbers on file: 17W04379B (Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc), 17W04379B (Micro Plastics Inc).
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.