The Nut,self-Locking,barrel, cataloged under National Stock Number 5310-01-129-7612, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-129-7612 |
| Primary Part Number | ST3M875-3 |
| Item Name | Nut,self-Locking,barrel |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Nut Length | 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 250.0 FAHRENHEIT MAXIMUM DEGF |
| Nut Counterbore Depth | 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM BASE IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Nut Diameter | 0.3990 INCHES MINIMUM AND 0.4020 INCHES MAXIMUM IN |
| Counterbore Diameter | 0.222 INCHES MINIMUM AND 0.232 INCHES MAXIMUM BASE IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.309 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN |
| Nut Style | FLOATING SELF-LOCKING BARREL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 4130 NUT |
| Material | PLASTIC POLYAMIDE NYLON LOCKING INSERT |
| Material | ALUMINUM ALLOY 7075 BASE |
| Barrel Height | 0.245 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| 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 |
|---|---|
| ST3M875-3 | Howmet Global Fastening Systems Inc (USA) |
| ST3M875-3 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10109543 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| F55-2552-02 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-129-7612 is a Nut,self-Locking,barrel, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-129-7612 has 2 manufacturer part numbers on file: ST3M875-3 (Howmet Global Fastening Systems Inc), ST3M875-3 (The Boeing Company Div Defense).
Key specifications for ST3M875-3: Nut Length: 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Temp Rating: 250.0 FAHRENHEIT MAXIMUM DEGF; Nut Counterbore Depth: 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM BASE IN. 17 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.