The Nut,plain,castellated,hexagon, cataloged under National Stock Number 5310-01-338-0439, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-338-0439 |
| Primary Part Number | BACN10JD8ASU |
| Item Name | Nut,plain,castellated,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Width Across Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Nut Height | 0.547 INCHES MINIMUM AND 0.579 INCHES MAXIMUM IN |
| Nut Style | CASTELLATED, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | IRON ALLOY 660 OVERALL |
| Bearing Surface Type | WASHER FACED |
| 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 |
|---|---|
| BACN10JD8ASU | Howmet Global Fastening Systems Inc (USA) |
| BACN10JD8ASU | Boeing Defence Australia Ltd (AUS) |
| BACN10JD8ASU | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACN10JD8ASU | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| Reference | Meaning |
|---|---|
| BACN10JD8ASU | 3/2 Design control — primary reference U.S. Government activity |
| BACN10JD8ASU | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-338-0439 is a Nut,plain,castellated,hexagon, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-338-0439 has 4 manufacturer part numbers on file: BACN10JD8ASU (Howmet Global Fastening Systems Inc), BACN10JD8ASU (Boeing Defence Australia Ltd), BACN10JD8ASU (Sps Technologies, Llc Dba PB Fasteners), BACN10JD8ASU (Boeing Defence Australia Ltd Div Defense, Space & Security).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-669-4467. Verify interchangeability with system specifications before substitution.
Key specifications for BACN10JD8ASU: Lubrication: DRY FILM LUBRICANT; Width Across Flats: 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Temp Rating: 450.0 FAHRENHEIT NOMINAL DEGF. 12 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.