Screw assembly having a removable tip section

摘要

A screw (4) having a shank (41) and a removable tip section (42) made of different materials is disclosed. The tip section has a groove (422) at a tip portion, and an insertion section (423) at the opposite end to be received in a recess (415) of the shank body. Both the shank and removable tip have threaded portions (412, 424) of the same pitch, though the outer diameter of the shank thread (412) is greater than that of the tip portion thread (424).