The Bolt,machine, cataloged under National Stock Number 5306-01-306-4176, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 9 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-306-4176 |
| Primary Part Number | BACB30NM4K34 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 2.535 INCHES MINIMUM AND 2.565 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | BMS 10-85 TY 1 CAGEC 81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.425 INCHES NOMINAL IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | DISHED HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.115 INCHES MINIMUM AND 2.135 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY UNS R56400 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 |
|---|---|
| BACB30NM4K34 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30NM4K34 | Howmet Global Fastening Systems Inc (USA) |
| BACB30NM4K34 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NM4K34 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30NM4K34 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30NM4K34 | Huck International, Inc (USA) |
| BACB30NM4K34 | Hi-Shear Corporation (USA) |
| BACB30NM4K34 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30NM4K34 | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| Reference | Meaning |
|---|---|
| BACB30NM4K34 | 5/9 Secondary reference U.S. Government activity |
| BACB30NM4K34 | 5/2 Secondary reference U.S. Government activity |
| BACB30NM4K34 | 5/2 Secondary reference U.S. Government activity |
| BACB30NM4K34 | 3/9 Design control — primary reference U.S. Government activity |
| BACB30NM4K34 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-306-4176 is a Bolt,machine, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-306-4176 has 9 manufacturer part numbers on file: BACB30NM4K34 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30NM4K34 (Howmet Global Fastening Systems Inc), BACB30NM4K34 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30NM4K34 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30NM4K34 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 4 more.
Key specifications for BACB30NM4K34: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.125 INCHES MINIMUM AND 0.140 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.