noun
Usage: usually capitalized U&S
: an American screw thread that has a thread angle of 60 degrees and varies from 3 1/2 to 64 threads per inch
noun
Usage: usually capitalized U&S
: an American screw thread that has a thread angle of 60 degrees and varies from 3 1/2 to 64 threads per inch
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012