The Washer,lock, cataloged under National Stock Number 5310-01-592-4448, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Nd Defense Llc. Government technical data includes 2 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 | 5310-01-592-4448 |
| Primary Part Number | 25556R1 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Nd Defense Llc |
| Status | ACTIVE |
| Outside Diameter | 1.500 INCHES NOMINAL IN |
| Hole Diameter | 0.656 INCHES NOMINAL 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 |
|---|---|
| 25556R1 PRIMARY | Nd Defense Llc (USA) |
NSN 5310-01-592-4448 is a Washer,lock, manufactured by Nd Defense Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-592-4448 has 1 manufacturer part number on file: 25556R1 (Nd Defense Llc).
Key specifications for 25556R1: Outside Diameter: 1.500 INCHES NOMINAL IN; Hole Diameter: 0.656 INCHES NOMINAL IN. 2 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.