Contact Points for Straight Threads by Thread Type
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Thirty years ago, Gagemaker introduced the MRP® crest diameter and ovality gage which forever changed the industry. Today, the MRP® series of gages is the industry standard worldwide. Whether you call it Crest Diameter, Root Diameter, or Ball PD, Pitch Diameter governs the strength of the actual thread assembly and ensures API dimensional measurement specs […]
Gagemaker produces videos to aid and educate people on thread inspection and quality control. Here are a few of our more general videos: You can view all of our videos on Gagemaker’s Youtube channel. If you are unable to view our YouTube channel, please contact us directly.
Back to the Basics: Thread Addendum What is Thread Addendum? We’ve had a few questions on the subject of thread addendum, so we’d like to take a moment for clarification. Thread Addendum is simply the distance from the thread crest to the pitch line. Addendum is a shorter distance than the Thread Height. Further, Addendum […]