Size: M12*40 Unit weight: 0.066 Kg Flat washer: internal diameter 12 , external diameter: 24 Height of washer: 1.5 Product name : Metric bolt ( bolt nut ) DIN 933size : M3-M16 Length : 5MM - 180MMMaterial : SUS304 , SUS316 ...Standard : GB , ANSI . DIN , ISO ,BSW , JIS , special standard according to customerGrade : 4.8/8.8/10.9/12.9Finish: Zinc plating , plating Cr3+, dacromet .... According to ...