The Washer,lock, cataloged under National Stock Number 5310-01-362-1473, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Abaco Systems Limited. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-362-1473 |
| Primary Part Number | 421-4-25303-000 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Abaco Systems Limited |
| Status | ACTIVE |
| Style Designator | FLAT EXTERNAL TEETH |
| Outside Diameter | 8.7 MILLIMETERS MINIMUM AND 9.0 MILLIMETERS MAXIMUM MM |
| Material Thickness | 0.51 MILLIMETERS NOMINAL MM |
| Surface Treatment | ZINC AND PASSIVATE OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 5.1 MILLIMETERS MINIMUM AND 5.3 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| 421-4-25303-000 | Abaco Systems Limited (GBR) |
| Reference | Meaning |
|---|---|
| 421-4-25303-000 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-362-1473 is a Washer,lock, manufactured by Abaco Systems Limited, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-362-1473 has 1 manufacturer part number on file: 421-4-25303-000 (Abaco Systems Limited).
Key specifications for 421-4-25303-000: Style Designator: FLAT EXTERNAL TEETH; Outside Diameter: 8.7 MILLIMETERS MINIMUM AND 9.0 MILLIMETERS MAXIMUM MM; Material Thickness: 0.51 MILLIMETERS NOMINAL MM; Surface Treatment: ZINC AND PASSIVATE OVERALL. 6 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.