The Screw,machine, cataloged under National Stock Number 5305-01-264-3758, 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 Div PB Fasteners. Government technical data includes 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-264-3758 |
| Primary Part Number | PBF1378-2146 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Screw Surface Treatment | CADMIUM OR CHROMATE |
| Fastener Length | 3.137 INCHES MINIMUM AND 3.167 INCHES MAXIMUM IN |
| Screw Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 5TH MATERIAL RESPONSE |
| Thread Length | 0.252 INCHES MINIMUM AND 0.302 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | TORQUE SET |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNJC |
| Head Diameter | 0.244 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 2 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 |
|---|---|
| PBF1378-2146 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| SC1785R-06-48 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| LE111-0032-2146 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| LE111-0032-2146 | Howmet Global Fastening Systems Inc (USA) |
| LE111-0032-2146 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| LE111-0032-2146 | 7/2 Vendor item drawing reference The Boeing Company Div Legacy Am&m |
| 123181A06R | 5/2 Secondary reference U.S. Government activity |
| A032-2146 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-264-3758 is a Screw,machine, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-264-3758 has 5 manufacturer part numbers on file: PBF1378-2146 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), SC1785R-06-48 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), LE111-0032-2146 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), LE111-0032-2146 (Howmet Global Fastening Systems Inc), LE111-0032-2146 (Hi-Shear Corporation).
Key specifications for PBF1378-2146: Screw Surface Treatment: CADMIUM OR CHROMATE; Fastener Length: 3.137 INCHES MINIMUM AND 3.167 INCHES MAXIMUM IN; Screw Material Document and Classification: MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 5TH MATERIAL RESPONSE; Thread Length: 0.252 INCHES MINIMUM AND 0.302 INCHES MAXIMUM 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.