The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-371-4093, 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 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-371-4093 |
| Primary Part Number | BACB30NF9D72 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| 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 | 0.281 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN |
| Fastener Length | 5.090 INCHES MINIMUM AND 5.120 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 CL 2 TY 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.605 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.562 INCHES IN |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 4.490 INCHES MINIMUM AND 4.510 INCHES MAXIMUM IN |
| Width Between Flats | 0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN |
| Grip Diameter | 0.5605 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 4340 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 4.934 INCHES NOMINAL 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 |
|---|---|
| BACB30NF9D72 | Howmet Global Fastening Systems Inc (USA) |
| BACB30NF9D72 | Federal Manufacturing Corp (USA) |
| BACB30NF9D72 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30NF9D72 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30NF9D72 | Huck International, Inc (USA) |
| BACB30NF9D72 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NF9D72 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30NF9D72 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30NF9D72 | 5/9 Secondary reference U.S. Government activity |
| BACB30NF9D72 | 5/2 Secondary reference U.S. Government activity |
| BACB30NF9D72 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-371-4093 is a Bolt,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-371-4093 has 7 manufacturer part numbers on file: BACB30NF9D72 (Howmet Global Fastening Systems Inc), BACB30NF9D72 (Federal Manufacturing Corp), BACB30NF9D72 (Sps Technologies, Llc Dba PB Fasteners), BACB30NF9D72 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30NF9D72 (Huck International, Inc) and 2 more.
Key specifications for BACB30NF9D72: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.281 INCHES MINIMUM AND 0.296 INCHES MAXIMUM IN. 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.