A non-countersunk screw head is in the event the head with the screw is entirely exposed exterior your workpiece/content. Hex and Torx: Hex screws Use a hexagonal recess and require an Allen essential or hex drive. Torx screws, with a six-pointed star-shaped sample, deliver large torque transmission because of their https://types-of-roof-repair26935.life3dblog.com/28725048/fascination-about-types-of-screw-heads-list