... : carbon steel , stainless steel304 /316 , Alloy steel , Brass ..... As the customer requirementStandard : GB , ANSI . DIN , ISO ,BSW , JIS , special ... standard according to customer drawingsGrade : 4.8/8.8/10.9/12.9Size : M3 ... 180mmFinish: Zinc plating , plating Cr3+, dacromet ....According to customer requirementYour satisfaction is our pursuit ! Hot-selling and best ...