... steel, brass, aluminium 3.zinc plated,hdg,black carriage bolt Itemcarriage boltMaterial of carriage boltCarbon steel(,Q235,C1010,C1020,C1040,10b21,etc)Brass ... 8,grade10.9,grade12.9ANSI,ASTM:grade2,grade5 grade8Finishing of carriage boltColoured zinc-plated(galvanized,can be white,blue,yellow, ... M18 M20 M24 M27 M30 M32(Regular size)Length of carriage bolt8-300mmPayment TermT/T,L/C,etc.PortShenzhen or ...