standard：ISO,DIN,BS,AS,ASTM,ANSI，JIS

Spec.: M16-M30 & 1/2"-1 1/2"

class:10.9S

use:sets of tor-shear type high strength bolt for steel structure
they are used in industrial and civil building, the bridge of highway and railway, tower, master structure piping, bracket lift machine and other steel structure project.