The Screw,close Tolerance, cataloged under National Stock Number 5305-00-526-4145, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Federal Manufacturing Corp. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-526-4145 |
| Primary Part Number | BACB30LU3D15 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Federal Manufacturing Corp |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 1.268 INCHES MINIMUM AND 1.298 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.320 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.105 INCHES MINIMUM AND 1.135 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.337 INCHES MINIMUM AND 0.383 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 |
|---|---|
| BACB30LU3D15 PRIMARY | Federal Manufacturing Corp (USA) |
| BACB30LU3D15 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LU3D15 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LU3D15 PRIMARY | Huck International, Inc (USA) |
| BACB30LU3D15 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| BACB30LU3D15 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30LU3D15 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30LU3D15 | 5/9 Secondary reference Voi-Shan/chatsworth Div of Vsi Corp Sub of Fairchild Industries Inc |
| BACB30LU3D15 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| BACB30LU3D15 | 7/2 Vendor item drawing reference U.S. Government activity |
| BACB30LU3D15 | 5/9 Secondary reference U.S. Government activity |
| BACB30LU3D15 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-00-526-4145 is a Screw,close Tolerance, manufactured by Federal Manufacturing Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-526-4145 has 7 manufacturer part numbers on file: BACB30LU3D15 (Federal Manufacturing Corp), BACB30LU3D15 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30LU3D15 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30LU3D15 (Huck International, Inc), BACB30LU3D15 (Howmet Global Fastening Systems Inc) and 2 more.
Key specifications for BACB30LU3D15: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 1.268 INCHES MINIMUM AND 1.298 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 22 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.