- Contact points of different lengths are not interchangeable because any change in length of point radically changes the magnification of the indicator.
- Be sure to replace or interchange only with points of the same length.
- Points of the same length but having different tip diameters are completely interchangeable.
- Contact Point Thread Size is M1.7
- See below for more details
Brown & Sharpe - INTERAPID 312 Test Indicator Contact Points - M1.7 Thread
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