... 975, class 4.8, class 8.82. UNC, 2A, grade 2, grade 5, ASTM A193 B73. Size: M6 to M50 or 1/2 ... . Length: 50mm to 4000mm or 2 to 12' (12 feet) 5. Finish: Plain, black ,zinc plated, hot dip galvanized.HEX BOLTMaterial ... Purchasing Notice: Please lets know the Size, quantity, Material or Grade, surface If it is special and Non-standard products, please ...