The Screw,machine, cataloged under National Stock Number 5305-01-581-8984, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-581-8984 |
| Primary Part Number | BACB30VF4K3 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Screw Surface Treatment | ALUMINUM |
| Fastener Length | 0.543 INCHES MINIMUM AND 0.563 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 |
|---|---|
| BACB30VF4K3 | Hi-Shear Corporation (USA) |
| BACB30VF4K3 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30VF4K3 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30VF4K3 | Kelly Manufacturing Company (USA) |
| BACB30VF4K3 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| BACB30VF4K3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-581-8984 is a Screw,machine, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-581-8984 has 5 manufacturer part numbers on file: BACB30VF4K3 (Hi-Shear Corporation), BACB30VF4K3 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30VF4K3 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30VF4K3 (Kelly Manufacturing Company), BACB30VF4K3 (Huck International, Inc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-669-4067. Verify interchangeability with system specifications before substitution.
Key specifications for BACB30VF4K3: Screw Surface Treatment: ALUMINUM; Fastener Length: 0.543 INCHES MINIMUM AND 0.563 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.