The Bolt,shoulder, cataloged under National Stock Number 5306-01-144-2194, 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 22 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-144-2194 |
| Primary Part Number | ST3M840-6D44 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.044 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN |
| Head Height | 0.327 INCHES MINIMUM AND 0.347 INCHES MAXIMUM IN |
| Fastener Length | 3.349 INCHES MINIMUM AND 3.379 INCHES MAXIMUM IN |
| Shoulder Length | 2.740 INCHES MINIMUM AND 2.760 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.691 INCHES MINIMUM AND 0.701 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.4052 INCHES MINIMUM AND 0.4057 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.589 INCHES MINIMUM AND 0.639 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Head Minor Diameter | 0.448 INCHES MINIMUM AND 0.455 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.126 INCHES MINIMUM AND 3.166 INCHES MAXIMUM FIRST HOLE IN |
| 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 |
|---|---|
| ST3M840-6D44 PRIMARY | The Boeing Company Div Defense (USA) |
| MB162-6D44 PRIMARY | Hi-Shear Corporation (USA) |
| MB162-6D44 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| 122916-6D44 | 3/2 Design control — primary reference U.S. Government activity |
| VS3190-6D44Y | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-144-2194 is a Bolt,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-144-2194 has 3 manufacturer part numbers on file: ST3M840-6D44 (The Boeing Company Div Defense), MB162-6D44 (Hi-Shear Corporation), MB162-6D44 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for ST3M840-6D44: Extended Washer Thickness: 0.044 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN; Head Height: 0.327 INCHES MINIMUM AND 0.347 INCHES MAXIMUM IN; Fastener Length: 3.349 INCHES MINIMUM AND 3.379 INCHES MAXIMUM IN; Shoulder Length: 2.740 INCHES MINIMUM AND 2.760 INCHES MAXIMUM FIRST SHOULDER IN. 22 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.