The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-243-9171, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-243-9171 |
| Primary Part Number | BACS12BP3P8 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.420 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.332 INCHES NOMINAL 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 |
|---|---|
| BACS12BP3P8 | Boeing Defence Australia Ltd (AUS) |
| BACS12BP3P8 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACS12BP3P8 | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACS12BP3P8 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACS12BP3P8 PRIMARY | Huck International, Inc (USA) |
| BACS12BP3P8 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| BACS12BP3P8 | 5/9 Secondary reference U.S. Government activity |
| BACS12BP3P8 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-243-9171 is a Screw,cap,socket Head, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-243-9171 has 6 manufacturer part numbers on file: BACS12BP3P8 (Boeing Defence Australia Ltd), BACS12BP3P8 (Sps Technologies, Llc Dba PB Fasteners), BACS12BP3P8 (Boeing Defence Australia Ltd Div Defense, Space & Security), BACS12BP3P8 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BACS12BP3P8 (Huck International, Inc) and 1 more.
Key specifications for BACS12BP3P8: Fastener Length: 0.500 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.420 INCHES NOMINAL IN; Nominal Thread Diameter: 0.190 INCHES IN. 14 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.