Double Threaded Screw Pan Phillips Head Lathe Finish Undercut Gallery Double Threaded Screw Pan Phillips Head Lathe Finish Undercut Cold Forming, Machining Parts Double Threaded Screw Pan Phillips Head Lathe Finish Undercut Ric Sun2020-06-16T22:55:56-07:00 Double threaded screw is custom made screw with two types of thread. Pan Phillips head is the most [...] Double Threaded Screw Pan Phillips Head Lathe Finish UndercutRic Sun2020-06-16T22:55:56-07:00