... ,etc 3.SGS,ISO 4.black,zinc plated,HDG,etc double threaded bolts 1.Features Material: Carbon steel, stainless steelFinished: PL ... , Cr+3, Brass plated Grade: 4.8-8.8 Standard: DIN, ANSI/ASME, BS, GB, JIS, Non-standard Diameter: M6-M39 ... ,12.9ColorPlain, blue plated, white plated, yellow plated.StandardISO,GB,DIN,JIS,ANSICetificateISO9001-2008,SGS,ROHS Function Aatomobile,electronic,mechineryAfter sale ...