The Bolt,shoulder, cataloged under National Stock Number 5306-01-052-9813, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-052-9813 |
| Primary Part Number | BM4356-8-2073 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Head Height | 0.199 INCHES NOMINAL IN |
| Fastener Length | 2.511 INCHES NOMINAL IN |
| Shoulder Length | 2.073 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.499 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 2.318 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.106 INCHES NOMINAL FIRST HOLE IN |
| Material Document and Classification | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.684 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.318 INCHES NOMINAL FIRST HOLE IN |
| 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 |
|---|---|
| 71657C-8-2073 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| SII1058-8-2073 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| BM4356-8-2073 PRIMARY | Huck International, Inc (USA) |
| VCB0008B8-2-073 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| AIC4356-8-2073 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| PBF4356-8-2073 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 5306PL2082129 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| C4356-8-2073 | 7/2 Vendor item drawing reference U.S. Government activity |
| C4356-8-2073 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| 5306PL1496929 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| PBF4356 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| C4356-8-2073 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| C4356-8-2073 | 5/9 Secondary reference Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries |
| C4356-8-2073 | 5/9 Secondary reference Apex Engineering Products Corp |
| BM4356-8-2073 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-052-9813 is a Bolt,shoulder, manufactured by Huck International, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-052-9813 has 6 manufacturer part numbers on file: 71657C-8-2073 (Sps Technologies, Llc Dba PB Fasteners), SII1058-8-2073 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), BM4356-8-2073 (Huck International, Inc), VCB0008B8-2-073 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), AIC4356-8-2073 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 1 more.
Key specifications for BM4356-8-2073: Head Height: 0.199 INCHES NOMINAL IN; Fastener Length: 2.511 INCHES NOMINAL IN; Shoulder Length: 2.073 INCHES NOMINAL FIRST SHOULDER IN; Surface Treatment Document and Classification: NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 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.