The Nut,plain,castellated,hexagon, cataloged under National Stock Number 5310-00-271-6622, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-271-6622 |
| Item Name | Nut,plain,castellated,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Width Across Flats | 0.616 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN |
| Bearing Surface Finish | 63.0 MICROINCHES |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Hardness Rating | 19.0 ROCKWELL C MINIMUM AND 26.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Features Provided | CASEHARDENED |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Nut Height | 0.444 INCHES MINIMUM AND 0.464 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Countersink Angle | 85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM NUT |
| Nut Style | CASTELLATED, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 8740 OVERALL |
| Bearing Surface Type | CHAMFERED OR WASHER FACED |
| 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 |
|---|---|
| AN121555 | 2/2 Government specification standardization U.S. Government activity |
| 2101D6 | 5/1 Secondary reference Curtiss-Wright Controls, Inc. Div Actuation Division |
| 533 | 5/1 Secondary reference Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. |
NSN 5310-00-271-6622 is a Nut,plain,castellated,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-271-6622: Width Across Flats: 0.616 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN; Bearing Surface Finish: 63.0 MICROINCHES; Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNF. 17 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.