... 4.carbon steel; 1.all kinds of standard nuts such as GB,ISO.DIN.JIS,ANSI,BS, ... UNI,AS,etc and non-standard nuts;2.size range:Mm6-Mm20;3.we manufacture ... non-standard nuts according to customers'drawings or samples;4.grade ... our main products include hexagon nuts,flanged nuts,welded nuts,square nuts,nylon lock nuts,castle nuts,wheel nuts,long-nuts,etc.10.competive price ...