The Nut,self-Locking,barrel, cataloged under National Stock Number 5310-01-033-2676, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Leonardo Spa Helicopters Division - Production Site. Government technical data includes 21 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-033-2676 |
| Primary Part Number | BACN10HC6 |
| Item Name | Nut,self-Locking,barrel |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Leonardo Spa Helicopters Division - Production Site |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT OR SOLUBLE LUBRICANT |
| Nut Length | 0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Hardness Rating | 43.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 6322 ASSN STD 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.140 INCHES MINIMUM AND 0.160 INCHES MAXIMUM NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Nut Diameter | 0.646 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN |
| Specification/standard Data | 81205-BACN10HC MANUFACTURERS STANDARD |
| Counterbore Diameter | 0.406 INCHES MINIMUM AND 0.416 INCHES MAXIMUM NUT IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.556 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | NON-FLOATING SELF-LOCKING BARREL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 8740 OR STEEL COMP 4340 OVERALL |
| Barrel Height | 0.391 INCHES MINIMUM AND 0.411 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 |
|---|---|
| BACN10HC6 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| BACN10HC6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACN10HC6 | 5/9 Secondary reference The Boeing Company |
| BACN10HC6 | 3/2 Design control — primary reference U.S. Government activity |
| SL414-6 | 5/9 Secondary reference U.S. Government activity |
| BACN10HC6 | 5/2 Secondary reference U.S. Government activity |
| LH8065-064 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-033-2676 is a Nut,self-Locking,barrel, manufactured by Leonardo Spa Helicopters Division - Production Site, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-033-2676 has 2 manufacturer part numbers on file: BACN10HC6 (Leonardo Spa Helicopters Division - Production Site), BACN10HC6 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for BACN10HC6: Lubrication: DRY FILM LUBRICANT OR SOLUBLE LUBRICANT; Nut Length: 0.646 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 21 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.