The Screw,machine, cataloged under National Stock Number 5305-01-581-8987, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-581-8987 |
| Primary Part Number | BACB30VF4K7 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc Div City of Industry Operations |
| Status | ACTIVE |
| Screw Surface Treatment | ALUMINUM |
| Fastener Length | 0.798 INCHES MINIMUM AND 0.818 INCHES MAXIMUM IN |
| Thread Length | 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Shank Surface Treatment | ALUMINUM |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Surface Treatment | ALUMINUM |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | TITANIUM ALLOY |
| Color | BLACK |
| Internal Drive Style | TORQUE-SET RIBBED |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.364 INCHES MINIMUM AND 0.397 INCHES MAXIMUM IN |
| 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 |
|---|---|
| BACB30VF4K7 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30VF4K7 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30VF4K7 | Hi-Shear Corporation (USA) |
| BACB30VF4K7 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30VF4K7 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| BACB30VF4K7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-581-8987 is a Screw,machine, manufactured by Howmet Global Fastening Systems Inc Div City of Industry Operations, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-581-8987 has 5 manufacturer part numbers on file: BACB30VF4K7 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30VF4K7 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30VF4K7 (Hi-Shear Corporation), BACB30VF4K7 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30VF4K7 (Huck International, Inc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-699-9265. Verify interchangeability with system specifications before substitution.
Key specifications for BACB30VF4K7: Screw Surface Treatment: ALUMINUM; Fastener Length: 0.798 INCHES MINIMUM AND 0.818 INCHES MAXIMUM IN; Thread Length: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Shank Surface Treatment: ALUMINUM. 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.