size:M16-M64 ,1/2″-3

threads:30mm-3M ,1-1/2″--12（mm）

 

material:Q235,1045,42CrMo

Finish:zinc plated,black oxied,hot dipped zinc

 

Grade:4.6, 5.6, 6.8 ,8.8 。or SAE J429,ASTM A307,ASTM A325,ASTM A490。