Screw Pitch Gauge, 28 Leaves .25-2.5mm
The metric Starrett screw pitch gage can quickly determine the pitch of various threads. The gage consists of a substantial steel case with 28 folding leaves, each leaf having teeth corresponding to a definite pitch from 0.25mm to 2.5mm. Features a locking device at both ends of the case, so leaves can be securely locked in position for use. Leaves have a special narrow design, permitting checking internal threads in nuts, etc., as well as external threads.