The Screw,close Tolerance, cataloged under National Stock Number 5305-01-048-3253, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 15 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-048-3253 |
| Primary Part Number | BACB30LU2-12 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Fastener Length | 1.080 INCHES MINIMUM AND 1.110 INCHES MAXIMUM IN |
| 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 | 0.740 INCHES MINIMUM AND 0.760 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 8740 OR STEEL COMP E4340 OR STEEL COMP 4340 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 |
|---|---|
| BACB30LU2-12 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30LU2-12 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LU2-12 | Federal Manufacturing Corp (USA) |
| BACB30LU2-12 | Howmet Global Fastening Systems Inc (USA) |
| BACB30LU2-12 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| BACB30LU2-12 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LU2-12 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| BACB30LU2-12 | 5/2 Secondary reference U.S. Government activity |
| BACB30LU2-12 | 5/2 Secondary reference U.S. Government activity |
| BACB30LU2-12 | 5/2 Secondary reference U.S. Government activity |
| BACB30LU2-12 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BACB30LU2-12 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-048-3253 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-048-3253 has 7 manufacturer part numbers on file: BACB30LU2-12 (Sps Technologies, Llc Dba PB Fasteners), BACB30LU2-12 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30LU2-12 (Federal Manufacturing Corp), BACB30LU2-12 (Howmet Global Fastening Systems Inc), BACB30LU2-12 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries) and 2 more.
Key specifications for BACB30LU2-12: Fastener Length: 1.080 INCHES MINIMUM AND 1.110 INCHES MAXIMUM IN; Thread Length: 0.320 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.164 INCHES IN; Head Style: FLAT COUNTERSUNK. 15 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.