Hook-Hook Turnbuckle

A hook-hook turnbuckle is a mechanism consisting of a body with two threaded end fittings positioned opposite each other, into which hooks are screwed. The body is made either as an open rectangular frame or as a closed hollow cylinder.

Key characteristics that matter in practice when selecting a turnbuckle:

• maximum possible load;
• overall dimensions;
• the difference in device length between the fully extended and fully tightened states.

These parameters determine the application conditions for a specific model. The closed-cylinder type of hook turnbuckle is rarely used, for a narrow range of fastening tasks. Devices with frame-type bodies are the most widespread. According to GOST 9690-71 and OST 5.2314-79, their primary purpose is rigging and fastening fixtures on vessels of any class and category.

A hook-hook turnbuckle is used only for tensioning and adjusting wire ropes and cables, as well as for reinforcing rigid fastening. Use of this type of device for loading and unloading operations is prohibited.