PURPOSE: To simplify a work through smooth driving of a nail in a material, by a method wherein a wedge-shaped recessed groove the tip of which is deep is formed in the pipe wall surface of a shaft body part by a press work, and a V-shaped notch part is formed in the tip thereof to form a drive guide.
CONSTITUTION: A screw 2 is integrally coupled to the one end of a pipe 1 made of stainless, the wall surface of the pipe 1 is pressurized in the direction of the inner side of an opposing pipe wall surface from the one side. A deep wedge-shaped recessed groove 11 is formed in the tip thereof, and a V-shaped notch is formed in the tip of the groove wall to form a drive guide 12. This constitution smoothes driving of a nail in a resilient plate and concrete 4, and enables facilitation of a drive work.
Next Patent: DYNAMICALLY BALANCED DRIVE SHAFT AND METHOD OF PRODUCING THE SAME