Starrett 156M Screw Pitch Gauge 0.25 - 2.50mm

Screw pitch gauges quickly determine the pitch of various external and internal threads. These 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.
International metric standard - 60° Threads.
No. of leaves: 28.
Pitch range: 0.25 - 2.50mm.
Locking device.