What type of shackle is specifically designed with a screw pin?

The type of shackle that is specifically designed with a screw pin is known as a screw pin shackle. This particular design features a pin that is threaded and can be screwed into place, providing a secure, reliable connection for rigging applications. The screw pin allows for easy assembly and disassembly, making it convenient to use in lifting, towing, and securing loads.

The screw pin mechanism is essential because it minimizes the risk of the pin coming loose during operation, creating a safer environment when working with heavy loads. This design allows riggers to quickly and efficiently connect and disconnect equipment while maintaining strong integrity under strain.

Other types of shackles, such as safety shackles or load bearing shackles, may have different mechanisms and uses but do not feature the specific screw pin design that characterizes a screw pin shackle. This highlights the unique nature of the screw pin shackle in terms of versatility and security in various lifting and rigging applications.