The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-043-0554, 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 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-043-0554 |
| Primary Part Number | BACB30LJ6-29 |
| 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 | 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Fastener Length | 2.267 INCHES MINIMUM AND 2.297 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.445 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | UNDERCUT HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81205-BACB30NF MANUFACTURERS STANDARD |
| Grip Length | 1.802 INCHES MINIMUM AND 1.822 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| BACB30LJ6-29 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30LJ6-29 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LJ6-29 | Federal Manufacturing Corp (USA) |
| BACB30LJ6-29 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30LJ6-29 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| BACB30LJ6-29 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LJ6-29 | Howmet Global Fastening Systems Inc (USA) |
| BACB30LJ6-29 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BACB30NF6-29 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| BACB30NF6-29 | 5/9 Secondary reference U.S. Government activity |
| BACB30NF6-29 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BACB30NF6-29 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| BACB30NF6-29 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| BACB30NF6-29 | 5/9 Secondary reference U.S. Government activity |
| BACB30NF6-29 | 5/9 Secondary reference Federal Manufacturing Corp |
| BACB30NF6-29 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| BACB30NF6-29 | 5/9 Secondary reference U.S. Government activity |
| BACB30LJ6-29 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-043-0554 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 5306-01-043-0554 has 8 manufacturer part numbers on file: BACB30LJ6-29 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30LJ6-29 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30LJ6-29 (Federal Manufacturing Corp), BACB30LJ6-29 (Sps Technologies, Llc Dba PB Fasteners), BACB30LJ6-29 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok) and 3 more.
Key specifications for BACB30LJ6-29: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN. 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.