noun
: a screw thread so made that the sides, root, and crest of any section formed by a plane that passes through the thread axis are all equal theoretically to one half the pitch
noun
: a screw thread so made that the sides, root, and crest of any section formed by a plane that passes through the thread axis are all equal theoretically to one half the pitch
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012