DIN931,DIN933,DIN960,DIN961,DIN6914,BSW,AMSE all kinds of standards are ... ,black,plain3)size:diameter from M3 to M42,1/4" to 3/4",length from 8mm to 300mm,1/2" to 12 ... "4)packing:bulk packing,small box packing,gunny bag packing,or ... )loading port: shanghai or ningbo china6)delivery:30 days usually hex bolt din931,din934