The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-121-1693, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-121-1693 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Width Across Flats | 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Bearing Surface Finish | 125.0 MICROINCHES |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Configuration Style | CONFIGURATION B |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Specification/standard Data | 80205-NAS509 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Nut Height | 0.219 INCHES NOMINAL IN |
| Drilled Hole Diameter | 0.045 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Countersink Angle | 109.0 DEGREES MINIMUM AND 111.0 DEGREES MAXIMUM BOTH ENDS |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | IRON ALLOY 660 OVERALL |
| Bearing Surface Type | CHAMFERED |
| Hole Type and Quantity | 3 DRILLED |
| 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 |
|---|---|
| AD03A251-5CH | 5/9 Secondary reference U.S. Government activity |
| NAS509L5C | 3/2 Design control — primary reference U.S. Government activity |
| T-1156-5CH | 5/9 Secondary reference Long-Lok, Llc |
| H52826-5H | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| 03A251-5CH | 5/9 Secondary reference Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| 938.02.27.205 | 5/9 Secondary reference Pilatus Aircraft Ltd |
NSN 5310-01-121-1693 is a Nut,plain,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
Key specifications for 5310-01-121-1693: Width Across Flats: 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN; Bearing Surface Finish: 125.0 MICROINCHES; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 19 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.