The Bolt,shoulder, cataloged under National Stock Number 5306-01-142-9372, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 17 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-142-9372 |
| Primary Part Number | MB159-6-5 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 0.812 INCHES MINIMUM AND 0.859 INCHES MAXIMUM IN |
| Shoulder Length | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3896 INCHES MINIMUM AND 0.3901 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.490 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.578 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| 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 |
|---|---|
| ST3M837-6-5 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB159-6-5 PRIMARY | Hi-Shear Corporation (USA) |
| MB159-6-5 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1269-6-5 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M837-6-5 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| VS3191-6-5X | 5/9 Secondary reference U.S. Government activity |
| VS3191-6-5X | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| ST3M837-6-5 | 5/2 Secondary reference U.S. Government activity |
| 122914-6-5 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-142-9372 is a Bolt,shoulder, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-142-9372 has 5 manufacturer part numbers on file: ST3M837-6-5 (Sps Technologies, Llc Dba PB Fasteners), MB159-6-5 (Hi-Shear Corporation), MB159-6-5 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), PBF1269-6-5 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M837-6-5 (The Boeing Company Div Defense).
Key specifications for MB159-6-5: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 0.812 INCHES MINIMUM AND 0.859 INCHES MAXIMUM IN; Shoulder Length: 0.302 INCHES MINIMUM AND 0.322 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.