The Screw,machine, cataloged under National Stock Number 5305-00-984-4644, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-984-4644 |
| Primary Part Number | BACB30EMP5L4 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.203 INCHES MINIMUM AND 0.218 INCHES MAXIMUM IN |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 0.704 INCHES MINIMUM AND 0.734 INCHES MAXIMUM IN |
| Screw Material Document and Classification | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE |
| Thread Length | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 4340 |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Thread Series Designator | UNF |
| Head Diameter | 0.594 INCHES MINIMUM AND 0.615 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | AMS 2416 ASSN STD 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 |
|---|---|
| BACB30EMP5L4 PRIMARY | Hi-Shear Corporation (USA) |
| BACB30EMP5L4 PRIMARY | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30EMP5L4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30EMP5L4 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| BACB30EM-P5L4 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30EMP5L4 | 5/9 Secondary reference The Boeing Company |
| BACB30EMP5L4 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5305-00-984-4644 is a Screw,machine, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-984-4644 has 5 manufacturer part numbers on file: BACB30EMP5L4 (Hi-Shear Corporation), BACB30EMP5L4 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30EMP5L4 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BACB30EMP5L4 (Howmet Global Fastening Systems Inc), BACB30EM-P5L4 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for BACB30EMP5L4: Head Height: 0.203 INCHES MINIMUM AND 0.218 INCHES MAXIMUM IN; Screw Surface Treatment: CADMIUM; Fastener Length: 0.704 INCHES MINIMUM AND 0.734 INCHES MAXIMUM IN; Screw Material Document and Classification: MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE. 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.