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STI-BSW/BSF (Whitworth / brit. fine)

STI-Precision Thread plug gauge BSW/BSF

1. Before installing the V-COIL wire thread insert for british Whitworth 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.

British Whitworth thread for V-COIL wire thread inserts
Gauge dimensions acc. to works standard (BS 919-2)