... ,M210-300:0.007mm5 ISO:9001:2008 these nuts make their threads mesh with the counter-threads ... .They arewith superior locking force , and used when nuts easy to loose, with hightorque, and under severe working ... conditions1.we can custom standard ,nonstandard and special nuts,size from M2~M1000 andwith a varity of ... materials2.if order any left-hand thread nuts .pls notice3.all the above data is for ...