What feature distinguishes a lockbolt from other types of fasteners?

The distinctive feature of a lockbolt is that it effectively combines the properties of both rivets and traditional bolts, resulting in a unique fastening solution. Unlike rivets, which are permanent fasteners that can only be installed once and require special tools for removal, lockbolts can provide the structural integrity and reliability of bolts while also being quick to install and capable of ensuring resistance to loosening under vibration and dynamic loads. This characteristic makes lockbolts particularly advantageous in aerospace applications, where various conditions can affect the integrity of fastened joints.

Lockbolts are engineered to provide high shear and tensile strengths, much like traditional bolts, while also being efficient to install, similar to how rivets are used. This synergy in design leads to a fastener that can withstand demanding environments, thus distinguishing it from other types of fasteners on the market.

The other characteristics mentioned do not define a lockbolt. For instance, while certain fasteners may be suitable for high-temperature environments or adjustable post-installation, these features are not universally applicable to lockbolts. Moreover, lockbolts are not restricted to use with only aluminum materials, as they can efficiently join materials of various types and strengths.