Thick Threads : Threads that have the appearance of being cut off-form. This appearance would have to be substantiated with the use of a thread comparator, lead gauge, and/or depth gauge. (Bul 5T1, RP 5A5)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}