Which material is commonly used for the collar of a hi-shear rivet?

The collar of a hi-shear rivet is commonly made of aluminum due to its favorable properties for aviation applications. Aluminum is lightweight, which is a critical factor in aviation design, where reducing weight is essential for improving fuel efficiency and overall aircraft performance. Additionally, aluminum has good strength-to-weight ratio, corrosion resistance, and ease of fabrication, making it an ideal choice for various aerospace components.

In the context of hi-shear rivets, aluminum collars also provide enhanced shear strength, which is crucial for applications subject to static and dynamic loads. This combination of properties ensures reliable fastening and performance in conjunction with the rivet body, often made of high-strength materials, to withstand operational stresses in aircraft structures.