The Bolt,shoulder, cataloged under National Stock Number 5306-01-499-4458, 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 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-499-4458 |
| Primary Part Number | BACB30NM4K4 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc Div City of Industry Operations |
| Status | ACTIVE |
| Head Height | 0.105 INCHES NOMINAL IN |
| Fastener Length | 0.675 INCHES NOMINAL IN |
| Shoulder Length | 0.422 INCHES NOMINAL OVERALL IN |
| Shoulder Diameter | 0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM OVERALL IN |
| Thread Length | 0.380 INCHES NOMINAL IN |
| Shoulder Shape | ROUND OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Color | BLACK OVERALL |
| 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 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 |
|---|---|
| BACB30NM4K4 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| BACB30NM4K4 | Boeing Defence Australia Ltd (AUS) |
| BACB30NM4K4 | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| BACB30NM4K4 | Hi-Shear Corporation (USA) |
| BACB30NM4K4 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| BACB30NM4K4 | Huck International, Inc (USA) |
| BACB30NM4K4 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30NM4K4 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30NM4K4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-499-4458 is a Bolt,shoulder, manufactured by Howmet Global Fastening Systems Inc Div City of Industry Operations, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-499-4458 has 8 manufacturer part numbers on file: BACB30NM4K4 (Howmet Global Fastening Systems Inc Div City of Industry Operations), BACB30NM4K4 (Boeing Defence Australia Ltd), BACB30NM4K4 (Boeing Defence Australia Ltd Div Defense, Space & Security), BACB30NM4K4 (Hi-Shear Corporation), BACB30NM4K4 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok) and 3 more.
1 possible match (shared part number, not a government interchangeability claim): 5306-01-669-6585. Verify interchangeability with system specifications before substitution.
Key specifications for BACB30NM4K4: Head Height: 0.105 INCHES NOMINAL IN; Fastener Length: 0.675 INCHES NOMINAL IN; Shoulder Length: 0.422 INCHES NOMINAL OVERALL IN; Shoulder Diameter: 0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM OVERALL IN. 17 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.