The Bolt,shoulder, cataloged under National Stock Number 5306-01-142-8371, 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 17 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-142-8371 |
| Primary Part Number | BM17019-4-38X |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Head Height | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Fastener Length | 2.756 INCHES MINIMUM AND 2.803 INCHES MAXIMUM IN |
| Shoulder Length | 2.365 INCHES MINIMUM AND 2.385 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.2646 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.439 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 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 |
|---|---|
| BM17019-4-38X | Huck International, Inc (USA) |
| VS3037-4-38 | Howmet Global Fastening Systems Inc (USA) |
| VAL23607-4-38 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB88-4-38 | Hi-Shear Corporation (USA) |
| HP5497-4-38 | Heartland Precision Fasteners Inc (USA) |
| PBF1254-4-38 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| S11-1061-4-38 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| MB88-4-38 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M497-4-38 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M497-4-38 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| Reference | Meaning |
|---|---|
| 109450-4-38 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| MA5497-4-38 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| VS3037-4-38 | 5/9 Secondary reference U.S. Government activity |
| 109450-4-38 | 3/2 Design control — primary reference U.S. Government activity |
| BM17019-4-38X | 5/9 Secondary reference U.S. Government activity |
| ST3M497-4-38 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5306-01-142-8371 is a Bolt,shoulder, manufactured by Huck International, Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-142-8371 has 10 manufacturer part numbers on file: BM17019-4-38X (Huck International, Inc), VS3037-4-38 (Howmet Global Fastening Systems Inc), VAL23607-4-38 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), MB88-4-38 (Hi-Shear Corporation), HP5497-4-38 (Heartland Precision Fasteners Inc) and 5 more.
Key specifications for BM17019-4-38X: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 2.756 INCHES MINIMUM AND 2.803 INCHES MAXIMUM IN; Shoulder Length: 2.365 INCHES MINIMUM AND 2.385 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.