OMFG, this is my new favorite pen . . . I tell ya, ain't nothing like a good, hard screw.
Some screw threads are designed to mate with a complementary thread, known as an internal thread, which can perhaps create a good nut.
Oops, did I change the definition of a screw . . . (I'm so naughty).
Side Bar ~ Oh, and it writes well too . . . Don't you want a good screw?