The Screw,machine, cataloged under National Stock Number 5305-01-040-4655, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-040-4655 |
| Primary Part Number | BACS12CB04-20 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Head Height | 0.049 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN |
| Screw Surface Treatment | CADMIUM AND CHROMATE |
| Fastener Length | 1.190 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Thread Length | 1.140 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.181 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN |
| Screw Material | STEEL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNJC |
| Screw Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 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 |
|---|---|
| BACS12CB04-20 PRIMARY | The Boeing Company (USA) |
NSN 5305-01-040-4655 is a Screw,machine, manufactured by The Boeing Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-040-4655 has 1 manufacturer part number on file: BACS12CB04-20 (The Boeing Company).
Key specifications for BACS12CB04-20: Head Height: 0.049 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN; Screw Surface Treatment: CADMIUM AND CHROMATE; Fastener Length: 1.190 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Thread Length: 1.140 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN. 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.