Self-tapping screw/Tek screw in solar mounting system
In the solar mounting system, either in L foot, tile hook, trapezoidal roof hook, or rail joiner in ground mount, there is the self-tapping screw, some choose DACROMET carbon steel screw, some choose SUS410 screw, some use bi-metal hybrid screw. Self-tapping screws drill their own little tunnels by cutting precise threads when they are screwed into wood, plastic or metal.