The Bolt,shoulder, cataloged under National Stock Number 5306-01-142-7172, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-142-7172 |
| Primary Part Number | ST3M837-5-8 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 0.951 INCHES MINIMUM AND 0.998 INCHES MAXIMUM IN |
| Shoulder Length | 0.490 INCHES MINIMUM AND 0.510 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 |
|---|---|
| ST3M837-5-8 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M837-5-8 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M837-5-8 | Hi-Shear Corporation (USA) |
| PBF1269-5-8 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M837-5-8 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| Reference | Meaning |
|---|---|
| 122914-5-8 | 5/2 Secondary reference U.S. Government activity |
| VS3191-5-8X | 5/9 Secondary reference U.S. Government activity |
| VS3191-5-8X | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| MB159-5-8 | 5/9 Secondary reference Hi-Shear Corporation |
| ST3M837-5-8 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-142-7172 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-142-7172 has 5 manufacturer part numbers on file: ST3M837-5-8 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M837-5-8 (The Boeing Company Div Defense), ST3M837-5-8 (Hi-Shear Corporation), PBF1269-5-8 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M837-5-8 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace).
Key specifications for ST3M837-5-8: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 0.951 INCHES MINIMUM AND 0.998 INCHES MAXIMUM IN; Shoulder Length: 0.490 INCHES MINIMUM AND 0.510 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.