Features: 1)Product Name:T-Head Bolt 2)Material:Carton Steel and Stainless Steel 3)Surface:Black,Zinc Plated,Yellow Zinc Plated,Dacroment 4)Sizes:M6*10-M20*200 or 1/4"*1/2"-3/4"*12" 5)Standard:DIN,ANSI,BS,JIS,UNI