Since the screws will not likely stick out with the surface, they won't catch on to things which could omit the material. In artillery projectiles, anything that screws to the projectile needs to be given consideration as to what's going to transpire in the event the projectile is fired, e.g., https://types-of-roof-tile02728.smblogsites.com/29379567/types-of-screw-heads-no-further-a-mystery