... 2.threaded rod material,ss304,ss316,40Cr,etc 3.SGS,ISO 4.black,zinc plated,HDG,etc double threaded bolts 1 ... +3, Brass plated Grade: 4.8-8.8 Standard: DIN, ANSI/ASME, BS, GB, JIS, Non-standard Diameter: M6-M39,1/4-1 1 ... .8,12.9ColorPlain, blue plated, white plated, yellow plated.StandardISO,GB,DIN,JIS,ANSICetificateISO9001-2008,SGS,ROHS Function Aatomobile,electronic,mechineryAfter sale serviceIf ...