... screw wood screw machine screw taptite screw Thread die:The thread rolling dies we supply for customers including: ... or order,1. The material of thread rolling die you need or the material of screw you uesd2 ... .The type of thread rolling die for machine thread or tapping screw3.The screw head ... rolling shank, for example:5.The machine model/maker,die plates size, for example: Gv-2 24*55*112 ...