The Washer,lock, cataloged under National Stock Number 5310-00-398-0171, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Eaton Corp Opns & Technical Center. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-398-0171 |
| Primary Part Number | 16-2671 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Eaton Corp Opns & Technical Center |
| Status | ACTIVE |
| Heat Treatment | AS FABRICATED |
| Style Designator | FLAT INTERNAL TEETH |
| Outside Diameter | 0.593 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN |
| Material Thickness | 0.016 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.472 INCHES MINIMUM AND 0.484 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 16-2671 PRIMARY | Eaton Corp Opns & Technical Center (USA) |
NSN 5310-00-398-0171 is a Washer,lock, manufactured by Eaton Corp Opns & Technical Center, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-398-0171 has 1 manufacturer part number on file: 16-2671 (Eaton Corp Opns & Technical Center).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-1657. Verify interchangeability with system specifications before substitution.
Key specifications for 16-2671: Heat Treatment: AS FABRICATED; Style Designator: FLAT INTERNAL TEETH; Outside Diameter: 0.593 INCHES MINIMUM AND 0.607 INCHES MAXIMUM IN; Material Thickness: 0.016 INCHES MINIMUM AND 0.020 INCHES MAXIMUM IN. 7 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.