Taiwan Provincial Standard of the People's Republic of China
Latest
CNS 12209-1988
Scope
This standard applies to high-strength bolts, hexagonal nuts, and flat washers for torque control (hereinafter referred to as the group). They are mainly used in steel structures and are completely combined by surface friction of structural parts.
CNS 12209-1988 history
1988CNS 12209-1988 Sets of High Strength Torque Control Bolt, Hexagon Nut and Plain Washers