The Screw,close Tolerance, cataloged under National Stock Number 5305-01-040-1004, 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 19 specifications, cited from the U.S. Government catalog. The record lists 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-040-1004 |
| Primary Part Number | BACB30LH3-3 |
| 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 | 0.518 INCHES MINIMUM AND 0.548 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 |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| BACB30LH3-3 | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACB30LH3-3 PRIMARY | Federal Manufacturing Corp (USA) |
| BACB30LH3-3 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LH3-3 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LH3-3 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LH3-3 PRIMARY | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30LH3-3 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30LH3-3 PRIMARY | Huck International, Inc (USA) |
| BACB30LH3-3 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| BACB30LH3-3 | Boeing Defence Australia Ltd (AUS) |
| Reference | Meaning |
|---|---|
| BACB30LH3-3 | 7/2 Vendor item drawing reference U.S. Government activity |
| BACB30LH3-3 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30LH3-3 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-040-1004 is a Screw,close Tolerance, manufactured by Federal Manufacturing Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-040-1004 has 10 manufacturer part numbers on file: BACB30LH3-3 (Boeing Defence Australia Ltd Div Defense, Space & Security), BACB30LH3-3 (Federal Manufacturing Corp), BACB30LH3-3 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30LH3-3 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30LH3-3 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 5 more.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-669-6751. Verify interchangeability with system specifications before substitution.
Key specifications for BACB30LH3-3: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 0.518 INCHES MINIMUM AND 0.548 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 19 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.