The Bolt,shoulder, cataloged under National Stock Number 5306-01-142-8365, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-142-8365 |
| Primary Part Number | MB159-5-4 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 0.701 INCHES MINIMUM AND 0.748 INCHES MAXIMUM IN |
| Shoulder Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3271 INCHES MINIMUM AND 0.3276 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | SPLINE DRIVE SHEAR HEAD |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.514 INCHES MINIMUM AND 0.521 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 |
|---|---|
| MB159-5-4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M837-5-4 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M837-5-4 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| PBF1269-5-4 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB159-5-4 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| VS3191-5-4X | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| 122914-5-4 | 3/2 Design control — primary reference U.S. Government activity |
| VS3191-5-4X | 5/9 Secondary reference U.S. Government activity |
| ST3M837-5-4 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-142-8365 is a Bolt,shoulder, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-142-8365 has 5 manufacturer part numbers on file: MB159-5-4 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M837-5-4 (The Boeing Company Div Defense), ST3M837-5-4 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), PBF1269-5-4 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), MB159-5-4 (Hi-Shear Corporation).
Key specifications for MB159-5-4: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 0.701 INCHES MINIMUM AND 0.748 INCHES MAXIMUM IN; Shoulder Length: 0.240 INCHES MINIMUM AND 0.260 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.