The Bolt,shoulder, cataloged under National Stock Number 5306-01-264-3588, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 12 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-264-3588 |
| Primary Part Number | BACB30US7K24X |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok |
| Status | ACTIVE |
| Extended Washer Thickness | 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN |
| Head Height | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Fastener Length | 2.218 INCHES MINIMUM AND 2.248 INCHES MAXIMUM IN |
| Shoulder Length | 1.490 INCHES MINIMUM AND 1.510 INCHES MINIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | BMS10-85 TYPE 1, CAGE 81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.4516 INCHES MINIMUM AND 0.4526 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.733 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.4375 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Color | BLACK THREADS |
| Surface Treatment | ALUMINUM OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | NICKEL ALLOY 718 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 |
|---|---|
| BACB30US7K24X | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| BACB30US7K24X | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30US7K24X | Huck International, Inc (USA) |
| BACB30US7K24X | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30US7K24X | Howmet Global Fastening Systems Inc (USA) |
| BACB30US7K24X | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30US7K24X | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| BACB30US7K24X | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30US7K24X | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| BACB30US7K24X | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30US7K24X | Federal Manufacturing Corp (USA) |
| BACB30US7K24X | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| Reference | Meaning |
|---|---|
| BACB30MT7T24X | 5/9 Secondary reference U.S. Government activity |
| BACB30MT7T24X | 5/9 Secondary reference U.S. Government activity |
| BACB30MT7T24X | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| BACB30MT7T24X | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| BACB30MT7T24X | 5/9 Secondary reference U.S. Government activity |
| BACB30US7K24X | 5/9 Secondary reference Mecair Aerospace Industries,subsidiary of Spstechnologiesdiv Division of Sps Technologiesdba Mecair Inc. Div Division of Sps Technologies |
| BACB30MT7T24X | 5/9 Secondary reference U.S. Government activity |
| BACB30MT7T24X | 5/9 Secondary reference U.S. Government activity |
| BACB30MT7T24X | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BACB30MT7T24X | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| BACB30US7K24X | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-264-3588 is a Bolt,shoulder, manufactured by Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-264-3588 has 12 manufacturer part numbers on file: BACB30US7K24X (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), BACB30US7K24X (Sps Technologies, Llc Dba PB Fasteners), BACB30US7K24X (Huck International, Inc), BACB30US7K24X (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30US7K24X (Howmet Global Fastening Systems Inc) and 7 more.
Key specifications for BACB30US7K24X: Extended Washer Thickness: 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN; Head Height: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN; Fastener Length: 2.218 INCHES MINIMUM AND 2.248 INCHES MAXIMUM IN; Shoulder Length: 1.490 INCHES MINIMUM AND 1.510 INCHES MINIMUM FIRST SHOULDER 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.