All thread sizes and wire rope sizes now conform to US standaJaw & Jaw Turnbuckles are used for adjusting the tension and/or length of ropes and cables. They consist of two threaded bolts screwed into each end of a metal body, one with left-hand thread and the other with right-hand thread. The tension can be adjusted by rotating the body, causing both bolts to be screwed in or out simultaneously, without twisting the bolts or attached cables. Ideal for anchor and mooring applications. All thread sizes and wire rope sizes now conform to U.S. standards and are interchangeable with most other U.S. manufacturers. 185105 has 5 mm metric threads.