The Screw,machine, cataloged under National Stock Number 5305-01-339-2273, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-339-2273 |
| Primary Part Number | BACS12GU3K48 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Head Height | 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN |
| Bearing Surface of Head Surface Finish | 63.0 MICROINCHES |
| Screw Surface Treatment | ALUMINUM |
| Fastener Length | 2.984 INCHES MINIMUM AND 3.031 INCHES MAXIMUM IN |
| Screw Material Document and Classification | AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 2.922 INCHES MINIMUM AND 3.031 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Thread Surface Finish | 32.0 MICROINCHES |
| 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 |
|---|---|
| BACS12GU3K48 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACS12GU3K48 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACS12GU3K48 | 3-V Fastener Co., Inc. (USA) |
| BACS12GU3K48 | Huck International, Inc (USA) |
| BACS12GU3K48 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| Reference | Meaning |
|---|---|
| BACS12GU3K48 | 3/2 Design control — primary reference U.S. Government activity |
| BACS12GU3K48 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| BACS12GU3K48 | 5/9 Secondary reference U.S. Government activity |
| BACS12GU3K48 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-339-2273 is a Screw,machine, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-339-2273 has 5 manufacturer part numbers on file: BACS12GU3K48 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACS12GU3K48 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACS12GU3K48 (3-V Fastener Co., Inc.), BACS12GU3K48 (Huck International, Inc), BACS12GU3K48 (Howmet Global Fastening Systems Inc Div City of Industry Operations).
Key specifications for BACS12GU3K48: Head Height: 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN; Bearing Surface of Head Surface Finish: 63.0 MICROINCHES; Screw Surface Treatment: ALUMINUM; Fastener Length: 2.984 INCHES MINIMUM AND 3.031 INCHES MAXIMUM IN. 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.