The Screw,close Tolerance, cataloged under National Stock Number 5305-01-044-8534, 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 18 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-044-8534 |
| Primary Part Number | BACB30LU2-8 |
| 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 | 0.830 INCHES MINIMUM AND 0.860 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 | 0.164 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Grip Diameter | 0.1625 INCHES MINIMUM AND 0.1635 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 | STEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNJC |
| Head Diameter | 0.295 INCHES MINIMUM AND 0.334 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 |
|---|---|
| BACB30LU2-8 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LU2-8 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| BACB30LU2-8 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LU2-8 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LU2-8 PRIMARY | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| BACB30LU2-8 PRIMARY | Federal Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| BACB30LU2-8 | 5/9 Secondary reference U.S. Government activity |
| BACB30LU2-8 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BACB30LU2-8 | 7/2 Vendor item drawing reference U.S. Government activity |
| BACB30LU2-8 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30LU2-8 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BACB30LU2-8 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-044-8534 is a Screw,close Tolerance, manufactured by Valley-Todeco, Inc. Dba Arconic Fastening Systems, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-044-8534 has 6 manufacturer part numbers on file: BACB30LU2-8 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30LU2-8 (Howmet Global Fastening Systems Inc), BACB30LU2-8 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30LU2-8 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30LU2-8 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries) and 1 more.
Key specifications for BACB30LU2-8: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 0.830 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 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.