You will discover various types of shanks and threads, including twinthread screws that have two threads functioning along the shank and may be pushed and removed more quickly, and maintain products much more securely. The several types of screw heads are: countersunk heads, bugle heads, pan heads and button heads. https://types-of-plumbing-repair84827.jts-blog.com/28780901/helping-the-others-realize-the-advantages-of-types-of-screw-heads-names