... taptite ISO: ISO9001:2008, ISO14001:2004 Features: Blue zinc plated Hex Head Tapping Screws 1.Material: ... Mild carbons Steel of grade4.8, grade 6.8, SUS201, SUS303, ... zinc plated(white zinc, black zinc, colour zinc, blue zinc), phophated, plain finish, nickel plated, chromated ... we will deliver the right things free of charges under normal conditions.Accept your design and ...