The Nut,self-Locking,single Ball Sea, cataloged under National Stock Number 5310-01-697-0856, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-697-0856 |
| Item Name | Nut,self-Locking,single Ball Sea |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Width Across Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS5737 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | AMS5737 ASSN STD SINGLE MATERIAL RESPONSE WASHER |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Specification/standard Data | 80205-NAS1727 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.540 INCHES NOMINAL IN |
| Ball Seat Radius | 0.561 INCHES NOMINAL IN |
| Nut Style | SINGLE BALL SEAT, DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | IRON ALLOY 660 NUT |
| Material | IRON ALLOY 660 WASHER |
| 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 |
|---|---|
| NAS1727K8E | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-697-0856 is a Nut,self-Locking,single Ball Sea, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-697-0856: Width Across Flats: 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Material Document and Classification: AMS5737 ASSN STD SINGLE MATERIAL RESPONSE NUT; Material Document and Classification: AMS5737 ASSN STD SINGLE MATERIAL RESPONSE WASHER. 15 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.