The Screw,close Tolerance, cataloged under National Stock Number 5305-01-049-5664, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Valley-Todeco, Inc. Dba Arconic Fastening Systems. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-049-5664 |
| Primary Part Number | BACB30LH3-6 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 0.705 INCHES MINIMUM AND 0.735 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.320 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-BACS12LH PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 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 |
|---|---|
| BACB30LH3-6 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| NTA11158-3-6 | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site (ITA) |
| BACB30LH3-6 | Howmet Global Fastening Systems Inc (USA) |
| BACB30LH3-6 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LH3-6 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LH3-6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30LH3-6 | Huck International, Inc (USA) |
| BACB30LH3-6 | Federal Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| BACB30LH3-6 | 5/2 Secondary reference U.S. Government activity |
| BACB30LH3-6 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30LH3-6 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-049-5664 is a Screw,close Tolerance, manufactured by Valley-Todeco, Inc. Dba Arconic Fastening Systems, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-049-5664 has 8 manufacturer part numbers on file: BACB30LH3-6 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), NTA11158-3-6 (Leonardo Spa Aeronautics Division - Pomigliano D'arco Site), BACB30LH3-6 (Howmet Global Fastening Systems Inc), BACB30LH3-6 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30LH3-6 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 3 more.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-669-6754. Verify interchangeability with system specifications before substitution.
Key specifications for BACB30LH3-6: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 0.705 INCHES MINIMUM AND 0.735 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 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.