The Bolt,machine, cataloged under National Stock Number 5306-01-266-7308, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Valley-Todeco, Inc. Dba Arconic Fastening Systems. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-266-7308 |
| Primary Part Number | BACB30MT8T-19Y |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Extended Washer Thickness | 0.015 INCHES NOMINAL IN |
| Head Height | 0.494 INCHES MINIMUM AND 0.514 INCHES MAXIMUM IN |
| Fastener Length | 1.986 INCHES MINIMUM AND 2.016 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS6487 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN |
| Thread Length | 0.788 INCHES MINIMUM AND 0.838 INCHES MAXIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.178 INCHES MINIMUM AND 1.198 INCHES MAXIMUM IN |
| Width Between Flats | 0.588 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL AND CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP H11 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 |
|---|---|
| BACB30MT8T-19Y | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30MT8T-19Y | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30MT8T-19Y | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30MT8T-19Y | Federal Manufacturing Corp (USA) |
| BACB30MT8T-19Y | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACB30MT8T-19Y | 3/2 Design control — primary reference U.S. Government activity |
| BACB30MT8T-19Y | 5/2 Secondary reference U.S. Government activity |
| BACB30MT8T-19Y | 5/9 Secondary reference U.S. Government activity |
| BACB30MT8T-19Y | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5306-01-266-7308 is a Bolt,machine, manufactured by Valley-Todeco, Inc. Dba Arconic Fastening Systems, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-266-7308 has 5 manufacturer part numbers on file: BACB30MT8T-19Y (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30MT8T-19Y (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30MT8T-19Y (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30MT8T-19Y (Federal Manufacturing Corp), BACB30MT8T-19Y (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for BACB30MT8T-19Y: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Extended Washer Thickness: 0.015 INCHES NOMINAL IN. 23 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.