The Bolt,shoulder, cataloged under National Stock Number 5306-01-274-1245, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-274-1245 |
| Primary Part Number | BACB30FD12-52Y |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Extended Washer Thickness | 0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Head Height | 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN |
| Fastener Length | 4.228 INCHES MINIMUM AND 4.258 INCHES MAXIMUM IN |
| Shoulder Length | 3.240 INCHES MINIMUM AND 3.260 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 1.220 INCHES MINIMUM AND 1.230 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.779 INCHES MINIMUM AND 0.780 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.993 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.797 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 4340 OR STEEL COMP 8740 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 |
|---|---|
| BACB30FD12-52X | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30FD12-52X | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30FD12-52Y PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BACB30FD12-52X | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| BACB30FD12-52X | 5/9 Secondary reference U.S. Government activity |
| BACB30FD12-52Y | 5/9 Secondary reference U.S. Government activity |
| BACB30FD12-52Y | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5306-01-274-1245 is a Bolt,shoulder, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-274-1245 has 3 manufacturer part numbers on file: BACB30FD12-52X (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30FD12-52X (Sps Technologies, Llc Dba PB Fasteners), BACB30FD12-52Y (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for BACB30FD12-52Y: Extended Washer Thickness: 0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN; Head Height: 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN; Fastener Length: 4.228 INCHES MINIMUM AND 4.258 INCHES MAXIMUM IN; Shoulder Length: 3.240 INCHES MINIMUM AND 3.260 INCHES MAXIMUM FIRST SHOULDER 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.