Thread gauges

Thread gauges
L-Gauges Inexpensive plastic gauges for measuring external thread.	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 Premium metal gauges that can measure both external and internal thread.	Identibolt Pro Premium thread gauge that can measure both external and internal threads. With two detachable magnetic plates for convenient sizing.

Inexpensive plastic gauges for measuring external thread.

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

Premium metal gauges that can measure both external and internal thread.

Premium thread gauge that can measure both external and internal threads. With two detachable magnetic plates for convenient sizing.