The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-303-3914, 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 18 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-303-3914 |
| Primary Part Number | BH00303CM-6 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bristol Industries, Llc |
| Status | ACTIVE |
| Washer Outside Diameter | 0.649 INCHES MAXIMUM IN |
| Width Across Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Precious Material | SILVER |
| Temp Rating | 900.0 FAHRENHEIT MAXIMUM DEGF |
| Washer Thickness | 0.060 INCHES MINIMUM IN |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Specification/standard Data | 81205-BACN10HR PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | SILVER OVERALL |
| Precious Material and Location | OVERALL SILVER |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| 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 |
|---|---|
| BH00303CM-6 | Bristol Industries, Llc (USA) |
| CR-6030-6 | Howmet Fixations Simmonds SAS (FRA) |
| H51560-6 | Howmet Global Fastening Systems Inc (USA) |
| 67832CD-624 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BMN5024CWD3-6 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| SL7108C-624 | 5/9 Secondary reference Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace |
| 102LH9031-6 | 3/9 Design control — primary reference Harvard Industries Inc |
| BACN10HR6CD | 5/2 Secondary reference U.S. Government activity |
| BMN5024CWD3-6 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-303-3914 is a Nut,self-Locking,extended Washer, manufactured by Bristol Industries, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-303-3914 has 5 manufacturer part numbers on file: BH00303CM-6 (Bristol Industries, Llc), CR-6030-6 (Howmet Fixations Simmonds SAS), H51560-6 (Howmet Global Fastening Systems Inc), 67832CD-624 (Sps Technologies, Llc Dba PB Fasteners), BMN5024CWD3-6 (Huck International, Inc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-669-6861. Verify interchangeability with system specifications before substitution.
Key specifications for BH00303CM-6: Overall Height: 0.455 INCHES MAXIMUM IN; Washer Outside Diameter: 0.649 INCHES MAXIMUM IN; Width Across Flats: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 18 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.