The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-654-0625, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-654-0625 |
| Primary Part Number | 1675-881 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Lockheed Martin Corporation |
| Status | ACTIVE |
| Washer Outside Diameter | 8.0 MILLIMETERS MAXIMUM MM |
| Width Across Flats | 4.9 MILLIMETERS MINIMUM AND 5.0 MILLIMETERS MAXIMUM MM |
| Thread Tolerance Class | 4H6H INTERNAL |
| Thread Series | MJ |
| Washer Thickness | 0.6 MILLIMETERS MINIMUM MM |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 4.0 MILLIMETERS MM |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1675-881 PRIMARY | Lockheed Martin Corporation (USA) |
NSN 5310-01-654-0625 is a Nut,self-Locking,extended Washer, manufactured by Lockheed Martin Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-654-0625 has 1 manufacturer part number on file: 1675-881 (Lockheed Martin Corporation).
Key specifications for 1675-881: Overall Height: 4.0 MILLIMETERS MAXIMUM MM; Washer Outside Diameter: 8.0 MILLIMETERS MAXIMUM MM; Width Across Flats: 4.9 MILLIMETERS MINIMUM AND 5.0 MILLIMETERS MAXIMUM MM; Thread Tolerance Class: 4H6H INTERNAL. 9 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.
NSN 5310-01-654-0625 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.