Are Hi-Lok pins interchangeable with different collars?

The correct answer emphasizes that Hi-Lok pins are not interchangeable with different collars in all cases. This is primarily due to the design and application requirements of these fasteners. Hi-Lok systems consist of a pin and a collar that are specifically engineered to fit together and function effectively under the stresses and requirements of aerospace applications.

Each Hi-Lok pin is designed with a specific diameter and length to match a corresponding collar that is calibrated for that particular pin type. When the pin and collar are paired correctly, they allow for reliable and secure fastening critical to aerospace structures, which must meet stringent safety standards. If different collars were used with a pin not designed for it, this could lead to improper function, reduced strength, and potential failures in the assembly.

Therefore, while some designs might allow for compatible combinations, it is generally critical to use the specific collar matched to the Hi-Lok pin being used. This ensures optimal fit, function, and safety, aligning with aerospace industry standards.