Roofing bolt 1.Bolt Size,M5-M20 2.Material,stainless steel,carbon steel 3.SGS,ISO 4.Zinc ... Nickel plated,Black Oxide,HDG Roofing bolt 1. Standard:DIN, ANSI, BSW, JSB ans ISO standard or non-standard as request ... &design.2. Material:Carbon steel, Alloy steel, stainless steel or according require ...