The Screw,machine, cataloged under National Stock Number 5305-01-203-3201, 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 15 specifications, cited from the U.S. Government catalog. The record lists 11 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-203-3201 |
| Primary Part Number | BACS12CK3U8 |
| 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 | 0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN |
| Screw Surface Treatment | PASSIVATE |
| Fastener Length | 0.470 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Screw Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 0.408 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Screw Material | IRON ALLOY 660 |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE |
| 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 |
|---|---|
| BACS12CK3U8 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACS12CK3U8 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| BACS12CK3U8 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACS12CK3U8 | 3-V Fastener Co., Inc. (USA) |
| BACS12CK3U8 PRIMARY | Federal Manufacturing Corp (USA) |
| BACS12CK3U8 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACS12CK3U8 | Heartland Precision Fasteners Inc (USA) |
| BACS12CK3U8 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACS12CK3U8 | Boeing Defence Australia Ltd (AUS) |
| BACS12CK3U8 | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACS12CK3U8 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| Reference | Meaning |
|---|---|
| BACS12CK3U8 | 3/2 Design control — primary reference U.S. Government activity |
| BACS12CK3U8 | 5/9 Secondary reference U.S. Government activity |
| BACS12CK3U8 | 3/2 Design control — primary reference U.S. Government activity |
| BACS12CK3U8 | 5/9 Secondary reference U.S. Government activity |
| BACS12CK3U8 | 7/2 Vendor item drawing reference U.S. Government activity |
| BACS12CK3U8 | 5/9 Secondary reference U.S. Government activity |
| BACS12CK3U8 | 5/9 Secondary reference Champion Aviation Inc Devilbiss Co Medical Product Div |
| BACS12CK3U8 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5305-01-203-3201 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 5305-01-203-3201 has 11 manufacturer part numbers on file: BACS12CK3U8 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACS12CK3U8 (Howmet Global Fastening Systems Inc), BACS12CK3U8 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACS12CK3U8 (3-V Fastener Co., Inc.), BACS12CK3U8 (Federal Manufacturing Corp) and 6 more.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-669-4778. Verify interchangeability with system specifications before substitution.
Key specifications for BACS12CK3U8: Head Height: 0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN; Screw Surface Treatment: PASSIVATE; Fastener Length: 0.470 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Screw Material Document and Classification: AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE. 15 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.