Self-tapping screw with improved cutting point

摘要: A self tapping screw with improved cutting point includes a head, body, double point, and washer. first thread second are formed on the body. The has same pitch as is between thread. major diameter which less than of starts at substantially shoulder continues to bottom head. washer placed under rubber seals hole created by self-tapping point. notch may be included improve deburring drilling ability thereof.