The Hillman Group 230340 Hanger Bolt, 5/16-Inch X 3 1/2-Inch, 50-Pack,Zinc
A Hanger bolt is a headless fastener that has machine screw threads on one end and self-tapping threads on the other. They are designed to hang items like sheet metal and wiring from wooden structures. Designed to be driven into wood or another soft substrate.