Hexagon washer head Self Drilling Screws with bonded EPDM washer , used to metal sheets in building , fence , Machines , aircraft and trucks etc., Self Drilling Screws Feature 1. Strong and fast drilling performance 2. Water-proof 3. Available for thick metal sheets , generally drilling depth from 2mm to 6mm , Material : ANSI 1018 and ANSI 1022 Finish : Chrome galvanized Size : #8x 2 Drilling point :# 3 |