The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-581-1979, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-581-1979 |
| Primary Part Number | BACS12GU4K29 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| BACS12GU4K29 PRIMARY | Huck International, Inc (USA) |
| BACS12GU4K29 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACS12GU4K29 PRIMARY | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACS12GU4K29 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BACS12GU4K29 | 3/2 Design control — primary reference U.S. Government activity |
| BACS12GU4K29 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-581-1979 is a Screw,cap,hexagon Head, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-581-1979 has 4 manufacturer part numbers on file: BACS12GU4K29 (Huck International, Inc), BACS12GU4K29 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACS12GU4K29 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACS12GU4K29 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for BACS12GU4K29: Special Features: THREAD SIZE: .2500-28 UNJF-3A; 160 KSI A; Part Name Assigned by Controlling Agency: SCREW, HEX HEAD WITH CROSS RECESS, TITANIUM. 0 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.