The Nut,self-Locking,clinch, cataloged under National Stock Number 5310-00-073-8185, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-00-073-8185 |
| Primary Part Number | MF7231-06 |
| Item Name | Nut,self-Locking,clinch |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Temp Rating | 900.0 FAHRENHEIT NOMINAL DEGF |
| Material Document and Classification | ASTM A286 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES IN |
| Nut Diameter | 0.312 INCHES MAXIMUM IN |
| Pilot Diameter | 0.249 INCHES MAXIMUM IN |
| Pilot Length | 0.040 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.235 INCHES NOMINAL IN |
| Nut Style | CLINCH |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| MF7231-06 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 175220A512 PRIMARY | L3harris Technologies, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 961353 | 5/9 Secondary reference U.S. Government activity |
| 70-200522-0646 | 5/9 Secondary reference Gte Government Systems Corp Strategic Systems Div |
| 1148318 | 5/9 Secondary reference Smiths Detection Inc. Dba Smiths Detection Inc Casc |
| MF7231-06 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
| 1786950-2 | 7/2 Vendor item drawing reference Honeywell Intl Inc Defense Avionics Systems |
| C318039317 | 3/2 Design control — primary reference U.S. Government activity |
| ST33C100-632 | 5/9 Secondary reference Ail Systems Inc Sub of Eaton Corp |
NSN 5310-00-073-8185 is a Nut,self-Locking,clinch, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-073-8185 has 2 manufacturer part numbers on file: MF7231-06 (Howmet Global Fastening Systems Inc), 175220A512 (L3harris Technologies, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-273-7556. Verify interchangeability with system specifications before substitution.
Key specifications for MF7231-06: Lubrication: DRY FILM LUBRICANT; Thread Series: UNIFIED NATIONAL COARSE (UNC); Temp Rating: 900.0 FAHRENHEIT NOMINAL DEGF; Material Document and Classification: ASTM A286 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.