The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-031-1446, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 21 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-031-1446 |
| Primary Part Number | BACB30NF5H27 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN |
| Fastener Length | 2.126 INCHES MINIMUM AND 2.156 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | Q-P-416,TY 2,CL 3 FED SPEC 13TH TREATMENT RESPONSE OVERALL |
| Thread Length | 0.429 INCHES MINIMUM AND 0.479 INCHES MAXIMUM IN |
| Hole Configuration Style | HEXAGON CORNERS |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | UNDERCUT HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.677 INCHES MINIMUM AND 1.697 INCHES MAXIMUM IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 140000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 4340 OR STEEL COMP 8740 OVERALL |
| Hole Quantity | 3 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.070 INCHES NOMINAL 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 |
|---|---|
| BACB30NF5H27 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| BACB30NF5H27 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30NF5H27 PRIMARY | Federal Manufacturing Corp (USA) |
| BACB30NF5H27 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NF5H27 PRIMARY | Huck International, Inc (USA) |
| BACB30NF5H27 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| BACB30NF5H27 | 5/9 Secondary reference U.S. Government activity |
| BACB30NF5H27 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30NF5H27 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30NF5H27 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BACB30NF5H27 | 7/2 Vendor item drawing reference U.S. Government activity |
| BACB30NF5H27 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-031-1446 is a Bolt,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-031-1446 has 6 manufacturer part numbers on file: BACB30NF5H27 (Howmet Global Fastening Systems Inc), BACB30NF5H27 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30NF5H27 (Federal Manufacturing Corp), BACB30NF5H27 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30NF5H27 (Huck International, Inc) and 1 more.
Key specifications for BACB30NF5H27: Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN; Fastener Length: 2.126 INCHES MINIMUM AND 2.156 INCHES MAXIMUM IN; Surface Treatment Document and Classification: Q-P-416,TY 2,CL 3 FED SPEC 13TH TREATMENT RESPONSE OVERALL. 21 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.