Hobson M12 Hex Set Screws are fully threaded Class 4.6 carbon-steel fasteners designed for general construction, fabrication and assembly work. Manufactured to AS 1111.2, each screw features an M12 × 1.75 coarse metric thread and a hexagonal head for installation using a standard 18mm spanner or socket. Available in lengths from 25mm to 150mm, the range accommodates different material thicknesses and fastening requirements.
A hot-dip galvanised finish to AS/NZS 1214 provides high corrosion resistance and makes these fasteners suitable for long-term outdoor applications. The coating has a typical listed thickness of 50µm, helping protect the underlying carbon steel in exposed environments. These fully threaded set screws provide maximum thread engagement along their nominal length; however, they should not be substituted for higher-strength structural fasteners or partially threaded bolts where these are specified by the application design.
Key Features
- M12 Class 4.6 hex set screw
- Fully threaded construction
- Standard M12 coarse metric thread
- Hot-dip galvanised for high corrosion resistance
- Suitable for long-term outdoor applications
- Manufactured to AS 1111.2
- Galvanised to AS/NZS 1214
- Low-to-medium-strength carbon-steel construction
- Installed using an 18mm spanner or socket
- Available in multiple lengths from 25mm to 150mm
- Suitable for use with compatible M12 nuts and washers
Applications
- General construction
- Outdoor fastening
- Steel fabrication
- Machinery assembly
- Equipment installation
- Brackets and support frames
- Fencing and gate construction
- Maintenance and repair work
- Non-structural steel connections
- General-purpose bolted assemblies
Specifications
- Product Type: Hex set screw
- Nominal Diameter: M12
- Thread: M12 × 1.75
- Thread Pitch: 1.75mm
- Thread Form: Fully threaded
- Material: Carbon steel
- Property Class: Class 4.6
- Product Standard: AS 1111.2
- Finish: Hot-dip galvanised
- Galvanising Standard: AS/NZS 1214
- Typical Coating Thickness: 50µm
- Spanner/Socket Size: 18mm
- Tensile Stress Area: 84.3mm²
- Core Area: 76.2mm²
- Minimum Tensile Stress: 400MPa
- Tensile Load: 33.7kN
- Proof Load: 19.0kN
- Shear Load: 18.3kN
- Recommended Tightening Torque: 62.1Nm – guidance value for the first tightening of a single HDG assembly
