The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-050-3327, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mack Trucks Inc Parts Opn. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-050-3327 |
| Primary Part Number | 21AX470 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mack Trucks Inc Parts Opn |
| Status | ACTIVE |
| Width Across Flats | 0.875 INCHES NOMINAL IN |
| Thread Series | UNF |
| Material Document and Classification | QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.562 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.688 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21AX470 PRIMARY | Mack Trucks Inc Parts Opn (USA) |
| Reference | Meaning |
|---|---|
| 426677 | 5/9 Secondary reference General Motors Corp |
| 360401S7A1 | 5/9 Secondary reference Ford Motor Company |
| 5310-050-3327 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 360401S7A1 | 5/9 Secondary reference Ford Motor Co Ford Parts and Service Div Government Part Sales |
| 426677 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
NSN 5310-00-050-3327 is a Nut,self-Locking,hexagon, manufactured by Mack Trucks Inc Parts Opn, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-050-3327 has 1 manufacturer part number on file: 21AX470 (Mack Trucks Inc Parts Opn).
1 possible match (shared part number, not a government interchangeability claim): 2840-00-737-1085. Verify interchangeability with system specifications before substitution.
Key specifications for 21AX470: Width Across Flats: 0.875 INCHES NOMINAL IN; Thread Series: UNF; Material Document and Classification: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL; 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.