The Nut,self-Locking,clinch, cataloged under National Stock Number 5310-01-044-1781, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-044-1781 |
| Primary Part Number | 525-624-9204 |
| Item Name | Nut,self-Locking,clinch |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS 2411 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Distance From Centerline to Flat | 0.194 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Precious Material | SILVER |
| Material Document and Classification | AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.091 INCHES NOMINAL FIRST END IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Nut Diameter | 0.371 INCHES MINIMUM AND 0.383 INCHES MAXIMUM IN |
| Counterbore Diameter | 0.195 INCHES MINIMUM AND 0.200 INCHES MAXIMUM FIRST END IN |
| Pilot Diameter | 0.235 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN |
| Pilot Length | 0.088 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.343 INCHES NOMINAL IN |
| Surface Treatment | SILVER OVERALL |
| Precious Material and Location | EXTERNAL SURFACE SILVER |
| 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 |
|---|---|
| BN00213-3-4 | Bristol Industries, Llc (USA) |
| 525-624-9204 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 525-624-9204 PRIMARY | Bristol Industries, Llc (USA) |
| K50309-3-6 | Howmet Global Fastening Systems Inc (USA) |
| 525-624-9204 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| L10486-6-3 | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| VN1598BA02-2 | 3/2 Design control — primary reference U.S. Government activity |
| 5250624-9204 | 3/2 Design control — primary reference U.S. Government activity |
| L10486-6-3 | 5/9 Secondary reference Harvard Industries Inc |
| 525-624-9204 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5310-01-044-1781 is a Nut,self-Locking,clinch, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-044-1781 has 6 manufacturer part numbers on file: BN00213-3-4 (Bristol Industries, Llc), 525-624-9204 (Sps Technologies, Llc Dba PB Fasteners), 525-624-9204 (Bristol Industries, Llc), K50309-3-6 (Howmet Global Fastening Systems Inc), 525-624-9204 (Howmet Global Fastening Systems Inc) and 1 more.
Key specifications for 525-624-9204: Surface Treatment Document and Classification: AMS 2411 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Distance From Centerline to Flat: 0.194 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Precious Material: SILVER. 20 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.