The Bolt,shoulder, cataloged under National Stock Number 5306-01-142-9900, 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 20 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-142-9900 |
| Primary Part Number | MB161-8-82 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Extended Washer Thickness | 0.062 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN |
| Head Height | 0.440 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN |
| Fastener Length | 5.877 INCHES MINIMUM AND 5.907 INCHES MAXIMUM IN |
| Shoulder Length | 5.115 INCHES MINIMUM AND 5.135 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.922 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.5146 INCHES MINIMUM AND 0.5151 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.742 INCHES MINIMUM AND 0.792 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Head Minor Diameter | 0.644 INCHES MINIMUM AND 0.651 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| 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 |
|---|---|
| MB161-8-82 PRIMARY | Hi-Shear Corporation (USA) |
| MB161-8-82 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M839-8-82 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 122915-8-82 | 3/2 Design control — primary reference U.S. Government activity |
| VS3190-8-82X | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-142-9900 is a Bolt,shoulder, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-142-9900 has 3 manufacturer part numbers on file: MB161-8-82 (Hi-Shear Corporation), MB161-8-82 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M839-8-82 (The Boeing Company Div Defense).
Key specifications for MB161-8-82: Extended Washer Thickness: 0.062 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN; Head Height: 0.440 INCHES MINIMUM AND 0.460 INCHES MAXIMUM IN; Fastener Length: 5.877 INCHES MINIMUM AND 5.907 INCHES MAXIMUM IN; Shoulder Length: 5.115 INCHES MINIMUM AND 5.135 INCHES MAXIMUM FIRST SHOULDER IN. 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.