The Washer,flat, cataloged under National Stock Number 5310-01-575-5889, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems Land & Armaments L.p.. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-575-5889 |
| Primary Part Number | 6437550-55M1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bae Systems Land & Armaments L.p. |
| 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 |
|---|---|
| 6437550-55M1 | Amz Alabama Inc. (USA) |
| 6437550-55M1 PRIMARY | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| 6437550-55M1 | 3/9 Design control — primary reference Bae Systems Survivability Systems Llc |
NSN 5310-01-575-5889 is a Washer,flat, manufactured by Bae Systems Land & Armaments L.p., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-575-5889 has 2 manufacturer part numbers on file: 6437550-55M1 (Amz Alabama Inc.), 6437550-55M1 (Bae Systems Land & Armaments L.p.).
Key specifications for 6437550-55M1: Special Features: WASHER,FLAT,HARDENED; Part Name Assigned by Controlling Agency: WASHER, 1/2 INCH IN; End Item Identification: 9515-01-563-0360;KIT,ARMOR,MEDIUM CRAWLER TRACTOR. 0 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.