The Washer,flat, cataloged under National Stock Number 5310-01-202-1643, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Curtis-Toledo, Inc. (CAGE 55921); Century Fasteners Corp. Dba Century Fasteners Corp (CAGE 06641); Naval Sea Systems Command (CAGE 53711); Bae Systems Land & Armaments L.p. (CAGE 44114) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-202-1643 |
| Primary Part Number | 5338739-307 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 5338739-307 | Curtis-Toledo, Inc. (USA) |
| 5338739-307 | Century Fasteners Corp. Dba Century Fasteners Corp (USA) |
| 5338739-307 PRIMARY | Naval Sea Systems Command (USA) |
| 2108-63826 | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| 5338739-307 | 7/9 Vendor item drawing reference Sps Technologies Inc Unbrako Div |
| 5310PL0818955 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5338739-307 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5310-01-202-1643 is a Washer,flat, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-202-1643 has 4 manufacturer part numbers on file: 5338739-307 (Curtis-Toledo, Inc.), 5338739-307 (Century Fasteners Corp. Dba Century Fasteners Corp), 5338739-307 (Naval Sea Systems Command), 2108-63826 (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.