The Screw,machine, cataloged under National Stock Number 5305-01-338-4568, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Boeing Defence Australia Ltd Div Defense, Space & Security. Government technical data includes 14 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-338-4568 |
| Primary Part Number | BACS12GU3K37 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Boeing Defence Australia Ltd Div Defense, Space & Security |
| Status | ACTIVE |
| Head Height | 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Screw Surface Treatment | ALUMINUM |
| Fastener Length | 2.296 INCHES MINIMUM AND 2.343 INCHES MAXIMUM IN |
| Screw Material Document and Classification | AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 2.218 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.305 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN |
| Screw Material | TITANIUM ALLOY UNS R56400 |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| BACS12GU3K37 | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACS12GU3K37 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACS12GU3K37 | Boeing Defence Australia Ltd (AUS) |
| BACS12GU3K37 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACS12GU3K37 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| BACS12GU3K37 | 3/2 Design control — primary reference U.S. Government activity |
| BACS12GU3K37 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BACS12GU3K37 | 5/2 Secondary reference U.S. Government activity |
| BACS12GU3K37 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-338-4568 is a Screw,machine, manufactured by Boeing Defence Australia Ltd Div Defense, Space & Security, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-338-4568 has 5 manufacturer part numbers on file: BACS12GU3K37 (Boeing Defence Australia Ltd Div Defense, Space & Security), BACS12GU3K37 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACS12GU3K37 (Boeing Defence Australia Ltd), BACS12GU3K37 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACS12GU3K37 (Howmet Global Fastening Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-669-4683. Verify interchangeability with system specifications before substitution.
Key specifications for BACS12GU3K37: Head Height: 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN; Screw Surface Treatment: ALUMINUM; Fastener Length: 2.296 INCHES MINIMUM AND 2.343 INCHES MAXIMUM IN; Screw Material Document and Classification: AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE. 14 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.