What is the full, cylindrical portion of the pin in a Hi-Lok called?

The full, cylindrical portion of the pin in a Hi-Lok is referred to as the shank. The shank is a crucial part of the fastener, as it is the part that provides the length necessary for insertion into the components being joined. Understanding the terminology associated with fasteners like Hi-Lok is essential for assembly mechanics, as it ensures clear communication and proper use of tools and components during assembly processes. The shank's design allows it to fit securely within the drilled hole of the materials being joined, contributing to the overall integrity and strength of the assembly.

The head serves a different purpose, typically acting as a point of contact for the tool used to install or remove the fastener. The collar, on the other hand, is associated with the fastening mechanism, while the base is generally not a term directly applied to the shank in this context. Therefore, recognizing that the shank is the cylindrical body of the Hi-Lok pin emphasizes important aspects of fastener functionality in aerospace assemblies.