STI-Precision Thread plug gauge UNF

1. Before installing the V-COIL wire thread insert for american fine threads: Inspection of a holding thread cut with an STI screw tap using an STI precision thread plug gauge.

2. Testing the dimensional accuracy of a V-COIL wire thread insert installed in the holding thread with a precision thread plug gauge for standard threads.

ANSI Unified fine thread for V-COIL wire thread inserts
Gauge dimensions acc. to ANSI B1.2