... fastener field Name: hex joint with male thread :hex joint: joint with male threadAbility for the material of this kind ... ,12.9,etc Carbon steel Gr.B,Gr.C,Gr.D,Gr.36,Gr.58,1010,1015 ... ,etc Alumimum 100,5052,6061,6063,etc Ability for the surface finish: Electroplate Zinc plated(while,colour ... finish Grinding and polishing,etc,except mirror Ability for the tolerance: Roundess 0.002mm Cylindricity 0.003mm ...