The term 'Thread Site' can be solved by the crossword solution 'SCREW', which is a five-letter word. A SCREW is a type of fastener, usually made of metal, that is used to join two or more objects together. It has a helical ridge, known as a male thread, on the outside and a tapped hole, known as a female thread, on the inside. The SCREW is inserted into the tapped hole and then turned, causing the threads to interlock and hold the objects together.