Truncation:
a. The crest truncation of a thread is the distance perpendicular to the axis, between the basic profile sharp crest (or crest apex) and the cylinder or cone that would bound the adjacent basic profile (flat) crest.
B. The root truncation of a thread is the distance measured perpendicular to the axis, between the basic sharp root (or root apex) and the cylinder or cone that would bound the root.
Original Posting: 3/20/2012
Last Revision:
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