The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-040-3364, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc Div City of Industry Operations. Government technical data includes 20 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-040-3364 |
| Primary Part Number | BACB30LJ7DU25 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc Div City of Industry Operations |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.219 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN |
| Fastener Length | 2.088 INCHES MINIMUM AND 2.118 INCHES MAXIMUM IN |
| Thread Length | 0.516 INCHES MINIMUM AND 0.566 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | UNDERCUT HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81205-BACB30LJ MANUFACTURERS STANDARD |
| Grip Length | 1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM IN |
| Width Between Flats | 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN |
| Grip Diameter | 0.4365 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.862 INCHES MINIMUM AND 1.912 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| BACB30LJ7DU25 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30LJ7DU25 | Federal Manufacturing Corp (USA) |
| BACB30LJ7DU25 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LJ7DU25 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LJ7DU25 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| BACB30LJ7DU25 | Howmet Global Fastening Systems Inc (USA) |
| BACB30LJ7DU25 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LJ7DU25 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30LJ7DU25 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30LJ7DU25 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-040-3364 is a Bolt,close Tolerance, manufactured by Howmet Global Fastening Systems Inc Div City of Industry Operations, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-040-3364 has 8 manufacturer part numbers on file: BACB30LJ7DU25 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30LJ7DU25 (Federal Manufacturing Corp), BACB30LJ7DU25 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30LJ7DU25 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30LJ7DU25 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok) and 3 more.
Key specifications for BACB30LJ7DU25: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.219 INCHES MINIMUM AND 0.234 INCHES MAXIMUM IN. 20 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.