Starrett STR159M 159M Screw Pitch Gauge 0.5-11.5mm 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 degree; threads. No. of leaves: 28. Pitch range: 0.5 - 11.5mm. Locking device and 60 degree; gauge.
