Starrett 6 Screw Pitch Gage With Locking Device, 4 42 Threads Per Inch, 30 Leaves

Positive stop locking device at both ends, so leaves can be securely locked in position for use Specially designed narrow leaves permit checking of internal threads in nuts, as well as external threads Screw pitch gauges quickly determine the pitch of various external and internal threads. gauges consist of a substantial steel case with a number of folding leaves at both ends each leaf having teeth corresponding to a definite pitch.