What is the U-shaped connector with a threaded pin used to secure rigging connections?

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Prepare for the USITT Backstage Terminology Safety Test. Study with flashcards and multiple-choice questions. Each question includes hints and explanations. Get ready for your exam today!

Multiple Choice

What is the U-shaped connector with a threaded pin used to secure rigging connections?

Explanation:
The thing being described is a shackle, specifically the screw-pin type. This is a U-shaped metal connector with a threaded pin that screws into the opposite end, allowing you to quickly join or detach rigging components like wire rope, slings, or shackles to a truss or other hardware. The threaded pin keeps the connection secure and easy to reopen when needed, which is why it’s a common choice for removable, load-bearing connections in stage rigging. By contrast, a head block is a pulley, a rope lock is a device that grips rope to prevent movement, and a main line is the rope itself, not a connector.

The thing being described is a shackle, specifically the screw-pin type. This is a U-shaped metal connector with a threaded pin that screws into the opposite end, allowing you to quickly join or detach rigging components like wire rope, slings, or shackles to a truss or other hardware. The threaded pin keeps the connection secure and easy to reopen when needed, which is why it’s a common choice for removable, load-bearing connections in stage rigging. By contrast, a head block is a pulley, a rope lock is a device that grips rope to prevent movement, and a main line is the rope itself, not a connector.

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