... 2.Mm16-M20 3.plain , zinc or orthers 4.carbon steel; 1.all kinds of standard nuts such as GB,ISO ... ,true 8.0,8.8 and etc;5.material:carbon steel(incude A3#,34#,45#,etc,),6.finished:plain,yellow zinc ... products include hexagon nuts,flanged nuts,welded nuts,square nuts,nylon lock nuts,castle nuts,wheel nuts,long-nuts,etc.10 ...