A non-countersunk screw head is in the event the head on the screw is completely exposed exterior your workpiece/materials. Hex and Torx: Hex screws have a hexagonal recess and call for an Allen key or hex travel. Torx screws, with a 6-pointed star-formed sample, give higher torque transmission because of https://types-of-log-siding39517.blogmazing.com/28890749/types-of-screw-head-punch-for-dummies