The Nut,self-Locking,double Hexagon, cataloged under National Stock Number 5310-01-038-4780, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bristol Industries, Llc. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-038-4780 |
| Primary Part Number | BH436-7 |
| Item Name | Nut,self-Locking,double Hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bristol Industries, Llc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Width Across Flats | 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS 5662 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5663 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Specification/standard Data | 76301-ST3-436 MANUFACTURERS STANDARD |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.334 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN |
| Surface Treatment | COPPER AND NICKEL THREADS |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | NICKEL ALLOY 718 OVERALL |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| ST3M436-7M | The Boeing Company Div Defense (USA) |
| BH436-7 PRIMARY | Bristol Industries, Llc (USA) |
| H49817-7 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 77019-7 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| LH11434-7 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-038-4780 is a Nut,self-Locking,double Hexagon, manufactured by Bristol Industries, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-038-4780 has 4 manufacturer part numbers on file: ST3M436-7M (The Boeing Company Div Defense), BH436-7 (Bristol Industries, Llc), H49817-7 (Howmet Global Fastening Systems Inc), 77019-7 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for BH436-7: Lubrication: DRY FILM LUBRICANT; Width Across Flats: 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Material Document and Classification: AMS 5662 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5663 ASSN STD 2ND 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.