The Screw,machine, cataloged under National Stock Number 5305-01-661-6180, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-661-6180 |
| Primary Part Number | BACS12GX04A7 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.045 INCHES NOMINAL IN |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 0.4375 INCHES NOMINAL IN |
| Screw Material Document and Classification | AMS 5737 NATIONAL SPEC SINGLE MATERIAL RESPONSE |
| Thread Length | 0.3925 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.1120 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81205-BACS12GX MANUFACTURERS STANDARD |
| Screw Material | IRON ALLOY 660 |
| Color | GREEN |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNJC |
| Head Diameter | 0.213 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | QQ-P-416,TYPE II,CLASS 2 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 |
|---|---|
| BACS12GX04A7 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| BACS12GX04A7 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACS12GX04A7 PRIMARY | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACS12GX04A7 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACS12GX04A7 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BACS12GX04A7 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5305-01-661-6180 is a Screw,machine, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-661-6180 has 5 manufacturer part numbers on file: BACS12GX04A7 (Howmet Global Fastening Systems Inc), BACS12GX04A7 (Sps Technologies, Llc Dba PB Fasteners), BACS12GX04A7 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACS12GX04A7 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACS12GX04A7 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for BACS12GX04A7: Head Height: 0.045 INCHES NOMINAL IN; Screw Surface Treatment: CADMIUM; Fastener Length: 0.4375 INCHES NOMINAL IN; Screw Material Document and Classification: AMS 5737 NATIONAL SPEC SINGLE MATERIAL RESPONSE. 18 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.