The Washer,lock, cataloged under National Stock Number 5310-01-042-4472, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-042-4472 |
| Item Name | Washer,lock |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Style Designator | DISHED-INTERNAL TEETH |
| Outside Diameter | 0.618 INCHES MINIMUM AND 0.618 INCHES MINIMUM AND 0.632 INCHES MAXIMUM0.632 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.185 INCHES MINIMUM AND 0.185 INCHES MINIMUM AND 0.195 INCHES MAXIMUM0.195 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 |
| Reference | Meaning |
|---|---|
| PM21749 | 3/2 Design control — primary reference U.S. Government activity |
| PM21749 | 5/9 Secondary reference Unison Industries Llc |
| PM21749 | 5/9 Secondary reference Amphenol Corp Div Amphenol Aerospace Operations |
NSN 5310-01-042-4472 is a Washer,lock, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-042-4472: Style Designator: DISHED-INTERNAL TEETH; Outside Diameter: 0.618 INCHES MINIMUM AND 0.618 INCHES MINIMUM AND 0.632 INCHES MAXIMUM0.632 INCHES MAXIMUM IN; Surface Treatment: CADMIUM OVERALL; Material: STEEL OVERALL. 5 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.