Master Setting Plugs For Tri Roll Thread Comparators

Class "W" Full Form Master Setting Plugs gages are used to set Tri Roll Thread Comparators. Master Thread Setting plugs are manufactured to a go basic pitch diameter size. PITCH DIAMETER is the theoretical diametrical plane which passes through a thread at the point where the width of the thread tooth and groove are equal. The pitch diameter is measured by means of the universally recognized three wire method.

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  Master Setting Rings For  ITC-Internal Thread Comparators Class W tolerance master setting ring gages are used to set ITC – Internal Thread Comparators. Class W tolerance master setting ring gages are manufactured to a go basic functional diameter. FUNCTIONAL DIAMETER is the actual (measured) pitch diameter of a thread adjusted by the cumulative effects of lead error and angle error, which is always added to external threads and subtracted from internal threads. https://www.threadcheck.com/tri-roll-thread-comparator.asp?pcFilter=itc-comparator-and-gaging-segments-products