We stock a range of open bodied Turnbuckles. You may know them as bottle screws, rigging screws, or wire tensioners. They differ from the rigging screws in the other category by their different shape and body type, being an open type configuration. The threads are exposed on this type of rigging screw and many more different end types are available than The closed body variety Our Turnbuckles are manufactured in A4 AISI 316 stainless steel : The Turnbuckles uses include balustrading, sail shades, running rigging and catenery wires and used in construction industry. Check out our Wire Rope section for wire and swaging services.