... (1) Ability for the material of this kind of threaded rod: Grade3.6,4.6,4.8,5.6,6.8 ... ,8.8,9.8,10.9,12.9,etcCarbon steelGr.B,Gr.C,Gr.D,Gr.36,Gr.58,1010,1015 ... .01/200mm DIN975 M8 (M3-M56) black coated full thread rod,all thread rod anchor,ISO9001