SDCⓇ Clean bolt (Gas vent hole drilling)

◦ Plasma surface hardening process is provided onto surface of the screws to prevent contact corrosion between dissimilar metals.
◦ There is a vent hole on the center of the screw.

Guide

▶To maintain its high cleanness, special vacuum packing for delivery is provided for each component.    

Attention

▶Please make sure that open the package in a clean environment and do not touch it with your bare hands.