... steel or Stainless steel 3.Size Range: M1-M100, 4.Surface:Zinc, black, etc Specificationsthreaded rod, threaded stud, threaded bar1.material: Carbon ... : DIN975, ANSI ,BSW, GB. Gr 4.8-8.8.B7.4.Surface Treatment: Z.P. PLAIN, BLACK,HDG.5.Our capacity of production ... Carton+pallet, or according to the customers demands Threaded rod black zinc