The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-016-7181, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-016-7181 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Lubrication | SOLUBLE LUBRICANT |
| Width Across Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Bearing Surface Finish | 125.0 MICROINCHES |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 250.0 FAHRENHEIT MAXIMUM DEGF |
| Material Document and Classification | QQ-A-200/2,T6 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/4,T4 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-225/6,T6 FED SPEC 3RD MATERIAL RESPONSE OR QQ-A-200/11,T6 FED SPEC 4TH MATERIAL RESPONSE NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.266 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OR CHROMATE OVERALL EXCEPT INSERT |
| Countersink Angle | 88.0 DEGREES MINIMUM NUT |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | ALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2017 OR ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 7075 NUT |
| 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 |
|---|---|
| NASM25027 | 3/1 Design control — primary reference U.S. Government activity |
| MS21083D5 | 3/2 Design control — primary reference U.S. Government activity |
| MS21083D5 | 5/9 Secondary reference U.S. Government activity |
| 5310000167181 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 5310-00-016-7181 is a Nut,self-Locking,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-00-016-7181: Lubrication: SOLUBLE LUBRICANT; Width Across Flats: 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN; Bearing Surface Finish: 125.0 MICROINCHES; Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE OVERALL EXCEPT INSERT. 18 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.