Starrett 476 Screw Pitch Gauge tpi 3 1/2 - 60

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.

Whitworth standard - 55° threads

No. of leaves: 30

TPI range: 3 1/2 - 60

With positive stop.