Class 4.8/6.8/8.8/10.9/12.9 ... 2.Surface:ZINC,HDG,PLAIN 3.Certificate:ISO9001 Class 4.8/6.8/8.8/10.9/12.9 Carbon ... ANSI, ISO, GB.3)size:m6-m30,1/4''-1''4)length:10mm-250mm,1/2''--10''Detailed size description ... M27*90-270 M30*90-3005)grade:4.6,4.8 ,5.6,5.8,6.8,8.8,10.9,12. ... ,UNFModel NumberM6-M30PackingCarton,Jute Bag,Carton+PalletDelivery5-30daysCertificateISO9001 Class 4.8/6.8/8.8/10.9/12.9 Carbon ...