... .standard:ISO,GB,ANSI,BS 2.size of T bolt:M3-M64 1/4"-3" 3.surface:zp.black,hdg.. ... .rohs iso certificate T bolt1.various kinds of T bolt available.2.high quality competive price.3.material of T ... bolt:stainless steel ,carbon steel,alloy steel,copper and so ... Chromium-Plating,Black, Zinc-Plating or according require5.size:M3-M64 1/4"-3"6.standard:GB,DIN,JIS, ...