The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-033-9057, 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 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-033-9057 |
| Primary Part Number | BACB30EF8-6 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 1.110 INCHES MINIMUM AND 1.155 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Thread Length | 0.720 INCHES MINIMUM AND 0.795 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-7839 MIL SPEC SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PELLET OR STRIP THREADS |
| Surface Treatment | CADMIUM FASTENER |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | PLASTIC LOCKING FEATURE |
| Material | STEEL FASTENER |
| Thread Series Designator | UNF |
| Head Diameter | 0.935 INCHES MINIMUM AND 1.022 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 |
|---|---|
| BACB30EF8-6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30EF8-6 | Howmet Global Fastening Systems Inc (USA) |
| BACB30EF8-6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30EF8-6 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30EF8-6 | Federal Manufacturing Corp (USA) |
| BACB30EF8-6 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| BACB30EF8-6 | 5/9 Secondary reference Voi-Shan/chatsworth Div of Vsi Corp Sub of Fairchild Industries Inc |
| BACB30EF8-6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-033-9057 is a Screw,cap,socket Head, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-033-9057 has 6 manufacturer part numbers on file: BACB30EF8-6 (Sps Technologies, Llc Dba PB Fasteners), BACB30EF8-6 (Howmet Global Fastening Systems Inc), BACB30EF8-6 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30EF8-6 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30EF8-6 (Federal Manufacturing Corp) and 1 more.
Key specifications for BACB30EF8-6: Fastener Length: 1.110 INCHES MINIMUM AND 1.155 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE FASTENER; Thread Length: 0.720 INCHES MINIMUM AND 0.795 INCHES MAXIMUM IN; Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL. 18 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.