The Nut,self-Locking,clinch, cataloged under National Stock Number 5310-00-280-3247, 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 19 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-280-3247 |
| Primary Part Number | H49290-3-3 |
| 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 |
| Width Across Flats | 0.365 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Material Document and Classification | AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.090 INCHES MINIMUM AND 0.120 INCHES MAXIMUM NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Specification/standard Data | 76301-ST3-405 MANUFACTURERS STANDARD |
| Counterbore Diameter | 0.215 INCHES MINIMUM AND 0.225 INCHES MAXIMUM NUT IN |
| Pilot Diameter | 0.273 INCHES MINIMUM AND 0.277 INCHES MAXIMUM IN |
| Pilot Length | 0.099 INCHES MINIMUM AND 0.111 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.266 INCHES MINIMUM AND 0.293 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | CLINCH |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 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 |
|---|---|
| 7052ACM1032-3 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M405C3-3 | The Boeing Company Div Defense (USA) |
| H49290-3-3 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 70524CM1032-3 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| C11009-3-3 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-280-3247 is a Nut,self-Locking,clinch, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-280-3247 has 3 manufacturer part numbers on file: 7052ACM1032-3 (Sps Technologies, Llc Dba PB Fasteners), ST3M405C3-3 (The Boeing Company Div Defense), H49290-3-3 (Howmet Global Fastening Systems Inc).
Key specifications for H49290-3-3: Lubrication: DRY FILM LUBRICANT; Width Across Flats: 0.365 INCHES MINIMUM AND 0.377 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Temp Rating: 450.0 FAHRENHEIT NOMINAL DEGF. 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.