Compared to the body, the pin diameter of a shackle is always:

Compared to the body, the pin diameter of a shackle is always:

• A. unrelated to the body size
• B. larger than the body
• C. equal to the body
• D. smaller than the body

Answer: (B)

The load path in a shackle runs through the pin, with the body acting as a housing that keeps everything aligned. Making the pin diameter larger than the body’s opening gives more bearing area where the pin contacts the ears and more cross‑section for shear, so the pin is the element that primarily carries the load and is less likely to yield or fail before the body. That’s why the pin diameter is described as larger than the body in this context. If the pin were smaller, the body would become the weaker link and the safety of the connection would be reduced.

The load path in a shackle runs through the pin, with the body acting as a housing that keeps everything aligned. Making the pin diameter larger than the body’s opening gives more bearing area where the pin contacts the ears and more cross‑section for shear, so the pin is the element that primarily carries the load and is less likely to yield or fail before the body. That’s why the pin diameter is described as larger than the body in this context. If the pin were smaller, the body would become the weaker link and the safety of the connection would be reduced.