The Screw,machine, cataloged under National Stock Number 5305-01-172-0513, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc Div City of Industry Operations. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-172-0513 |
| Primary Part Number | BACS12CK3U20 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc Div City of Industry Operations |
| Status | ACTIVE |
| Head Height | 0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN |
| Screw Surface Treatment | PASSIVATE |
| Fastener Length | 1.190 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Screw Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 1.128 INCHES MINIMUM AND 1.250 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 | UNF |
| 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 |
|---|---|
| BACS12CK3U20 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACS12CK3U20 | Howmet Global Fastening Systems Inc (USA) |
| BACS12CK3U20 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACS12CK3U20 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACS12CK3U20 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACS12CK3U20 | Federal Manufacturing Corp (USA) |
| BACS12CK3U20 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACS12CK3U20 | 3/2 Design control — primary reference U.S. Government activity |
| BACS12CK3U20 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BACS12CK3U20 | 5/2 Secondary reference U.S. Government activity |
| BACS12CK3U20 | 5/2 Secondary reference U.S. Government activity |
| BACS12CK3U20 | 5/2 Secondary reference U.S. Government activity |
| BACS12CK3U20 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-172-0513 is a Screw,machine, manufactured by Howmet Global Fastening Systems Inc Div City of Industry Operations, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-172-0513 has 7 manufacturer part numbers on file: BACS12CK3U20 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACS12CK3U20 (Howmet Global Fastening Systems Inc), BACS12CK3U20 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACS12CK3U20 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACS12CK3U20 (Sps Technologies, Llc Dba PB Fasteners) and 2 more.
Key specifications for BACS12CK3U20: Head Height: 0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN; Screw Surface Treatment: PASSIVATE; Fastener Length: 1.190 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Screw Material Document and Classification: AMS 5737 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.