Hexagon high tensile bolts
Threaded portion of the bolt is calculated by:Bolt length upto 125mm: 6 + (2 x bolt diameter)Bolt length from 130mm: 12 + (2 x bolt diameter)Bolt length from 200mm: 25 + (2 x bolt diameter) e.g M8 x 120, threaded part is 6 + (2 x 8) = 22mm