This high-quality item is suited to design a 1/8 thread. Hose nipples were designed so that when air was released, the air pressure would equalize across the nipple. The air pressure in the tank would force the air into the air lines thus creating a stream of fast-moving air that was pushed to the front of the car. There would be enough pressure in the stream to create a hole in the tire but not enough pressure to cause the tire to blow up. When the air stream hit the surface of the track, it created a friction effect that forced the balls on the edge of the tire to push back to the inner tube thus creating the hole in the tire.