The Washer,flat, cataloged under National Stock Number 5310-01-686-5939, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Superior Washer & Gasket Corp. Dba Superior Washer & Gasket Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Washer,flat |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Superior Washer & Gasket Corp. Dba Superior Washer & Gasket Corp (CAGE 1L160); Supreme Integrated Technology, Inc. (CAGE 5BN34) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-686-5939 |
| Primary Part Number | NAS1149D0663J |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Superior Washer & Gasket Corp. Dba Superior Washer & Gasket Corp |
| 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 |
|---|---|
| NAS1149D0663J PRIMARY | Superior Washer & Gasket Corp. Dba Superior Washer & Gasket Corp (USA) |
| 510610-3000 FN 56 | Supreme Integrated Technology, Inc. (USA) |
| Reference | Meaning |
|---|---|
| NAS1149D0663J | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-686-5939 is a Washer,flat, manufactured by Superior Washer & Gasket Corp. Dba Superior Washer & Gasket Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-686-5939 has 2 manufacturer part numbers on file: NAS1149D0663J (Superior Washer & Gasket Corp. Dba Superior Washer & Gasket Corp), 510610-3000 FN 56 (Supreme Integrated Technology, 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.