The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-059-1926, 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 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-059-1926 |
| Primary Part Number | BACB30LR4P-10 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 1.078 INCHES MINIMUM AND 1.123 INCHES MAXIMUM IN |
| Thread Length | 0.438 INCHES MINIMUM AND 0.513 INCHES MAXIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81205-BACB30EF MANUFACTURERS STANDARD |
| Locking Feature | PELLET OR STRIP THREADS |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8630 OR STEEL COMP 4037 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.454 INCHES MINIMUM AND 0.510 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 |
|---|---|
| BACB30LR4P-10 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30LR4P-10 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LR4P-10 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LR4P-10 PRIMARY | Federal Manufacturing Corp (USA) |
| BACB30LR4P-10 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LR4P-10 PRIMARY | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| Reference | Meaning |
|---|---|
| BACB30LR4P-10 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-059-1926 is a Screw,cap,socket Head, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-059-1926 has 6 manufacturer part numbers on file: BACB30LR4P-10 (Sps Technologies, Llc Dba PB Fasteners), BACB30LR4P-10 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30LR4P-10 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30LR4P-10 (Federal Manufacturing Corp), BACB30LR4P-10 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 1 more.
Key specifications for BACB30LR4P-10: Fastener Length: 1.078 INCHES MINIMUM AND 1.123 INCHES MAXIMUM IN; Thread Length: 0.438 INCHES MINIMUM AND 0.513 INCHES MAXIMUM IN; Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL; Nominal Thread Diameter: 0.250 INCHES IN. 17 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.