The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-050-3278, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-050-3278 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Status | ACTIVE |
| Width Across Flats | 0.750 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | QQ-S-633,CANCELED FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.609 INCHES NOMINAL IN |
| Thread Class | 3B |
| Thread Quantity Per Inch | 14 |
| Material | STEEL NUT |
| Material | FIBER LOCKING INSERT |
| 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 |
|---|---|
| 126011 | 3/9 Design control — primary reference General Motors Corp |
| 126011 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
NSN 5310-00-050-3278 is a Nut,self-Locking,hexagon, classified under FSC 5310, Nuts and Washers. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 4920-00-170-9245, 5935-00-420-0327, 5305-01-409-0271. Verify interchangeability with system specifications before substitution.
Key specifications for 5310-00-050-3278: Width Across Flats: 0.750 INCHES NOMINAL IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: QQ-S-633,CANCELED FED SPEC SINGLE MATERIAL RESPONSE NUT; Thread Direction: RIGHT-HAND. 11 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.