Thread gauge

Thread gauges

Thread gauges

L-Gauge

L-Gauges

Inexpensive gauges for measuring external thread.

Internally threaded screw gauge

Internally threaded screw gauges

Solid plastic US and Metric screw/bolt thread gauge. Includes sizes #0 - 3/4" (coarse and fine) and 1.6mm - 16mm.

Thread Detective® Metal

Thread Detective - Metal

Premium gauges that can measure both external and internal thread.