Starrett 6 Screw Pitch Gauge tpi 4-42

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.

American National - 60 Threads

No. of leaves: 30

TPI Range: 4 - 42

Locking Device.