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STI-UNC (unified coarse)

STI-Precision Thread plug gauge UNC

1. Before installing the V-COIL wire thread insert for american coarse 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 coarse thread for V-COIL wire thread inserts
Gauge dimensions acc. to ANSI B1.2