WIRE THREAD SERIES

These gauges are used for checking oversize tapping, which is done for fitting wire thread inserts. Wire thread inserts are having external threads, which are oversize than the standard size, and internal threads, which are of standard dimensions. When tapped internal threads become oversize and standard screw cannot be fitted then wire thread inserts are used. Oversize tapping is done using wire thread taps and wire thread inserts are fitted in this.

5H and 6H classes are recommended for Metric threads.

DESIGNATION / MARKING SYSTEM

Size and Class of fits are marked as per Standard marking system, which is followed by "Wire Threads".
e.g. M10 x1.5 6H Wire Thread