Purlin Bolt head and nut dimensions will differ from standard bolts please refer to specification below for exact measurements. These bolts come supplied with a nut attached. Bolt length is measured from the underside of the head down.
 
Shank Diameter: 16mm
Length: 35mm
Thread Length: 35mm
Thread Pitch: 2.00mm
Head Diameter: 24mm
Head Height: 13.5mm
Flange Diameter: 32.00mm
Nut Height: 17.20mm
Steel Grade: Mild Steel 4.6Gr
Finish: Bright Zinc Plate
Standard: AS1110