The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-004-6428, 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 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-004-6428 |
| Primary Part Number | 395039 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bristol Industries, Llc |
| Status | ACTIVE |
| Washer Outside Diameter | 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN |
| Width Across Flats | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM |
| Washer Thickness | 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Locking Feature | FREE-RUNNING ALL METAL DESIGN |
| Surface Treatment | CADMIUM OVERALL |
| Countersink Angle | 85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM NUT |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 8740 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 |
|---|---|
| 395039 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 395039 | Esna, Llc (USA) |
| 395039 PRIMARY | Bristol Industries, Llc (USA) |
| 395039 PRIMARY | Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace (USA) |
| 395039 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| DLH3830-054 | 5/9 Secondary reference Harvard Industries Inc |
| 395039 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 395039 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-004-6428 is a Nut,self-Locking,extended Washer, manufactured by Bristol Industries, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-004-6428 has 5 manufacturer part numbers on file: 395039 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 395039 (Esna, Llc), 395039 (Bristol Industries, Llc), 395039 (Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace), 395039 (Howmet Global Fastening Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-357-0108. Verify interchangeability with system specifications before substitution.
Key specifications for 395039: Overall Height: 0.345 INCHES MINIMUM AND 0.360 INCHES MAXIMUM IN; Washer Outside Diameter: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN; Width Across Flats: 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 16 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.