The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-343-8339, 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 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-343-8339 |
| Primary Part Number | BH00182A4 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bristol Industries, Llc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 0.410 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN |
| Width Across Flats | 0.305 INCHES MINIMUM AND 0.313 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 MAXIMUM DEGF |
| Hardness Rating | 45.0 ROCKWELL C MAXIMUM |
| Washer Thickness | 0.025 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 OR STEEL COMP 4340 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 |
|---|---|
| BH00182A4 | Bristol Industries, Llc (USA) |
| 3D0006-4 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| HK51693-4 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| BH00182-4 | 5/9 Secondary reference Bristol Industries, Llc |
| SLN219-4 | 5/9 Secondary reference Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok |
| VN376A048W | 3/2 Design control — primary reference U.S. Government activity |
| 3D0006-4 | 5/2 Secondary reference U.S. Government activity |
| E10980-4 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-343-8339 is a Nut,self-Locking,extended Washer, manufactured by Bristol Industries, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-343-8339 has 2 manufacturer part numbers on file: BH00182A4 (Bristol Industries, Llc), 3D0006-4 (Howmet Global Fastening Systems Inc).
Key specifications for BH00182A4: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.218 INCHES MINIMUM AND 0.228 INCHES MAXIMUM IN; Washer Outside Diameter: 0.410 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN; Width Across Flats: 0.305 INCHES MINIMUM AND 0.313 INCHES MAXIMUM 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.