The Washer,flat, cataloged under National Stock Number 5310-01-587-7671, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Amz Alabama Inc. (CAGE 076M6); Caterpillar Inc Div Caterpillar Defense (CAGE 11083); Bae Systems Land & Armaments L.p. (CAGE 54786) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-587-7671 |
| Primary Part Number | 6444655-01M1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| 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 |
|---|---|
| 6444655-01M1 | Amz Alabama Inc. (USA) |
| 6444655-01M1 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| 6444655-01M1 PRIMARY | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| 6444561 | D/9 Drawing number reference only Bae Systems Survivability Systems Llc |
| 6444655-01M1 | 3/9 Design control — primary reference Bae Systems Survivability Systems Llc |
NSN 5310-01-587-7671 is a Washer,flat, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-587-7671 has 3 manufacturer part numbers on file: 6444655-01M1 (Amz Alabama Inc.), 6444655-01M1 (Caterpillar Inc Div Caterpillar Defense), 6444655-01M1 (Bae Systems Land & Armaments L.p.).
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.