True or False: Lockbolts are permanent threaded fasteners that combine the best features of a rivet and a bolt.

Lockbolts are indeed classified as permanent threaded fasteners, and they are designed to combine the beneficial characteristics of both rivets and bolts. This unique design allows them to provide a strong, vibration-resistant connection that maintains integrity under high-stress conditions.

Lockbolts consist of a manufactured bolt and a corresponding collar. When the lockbolt is installed, the collar is swaged onto the bolt, creating a secure and permanent joint. This method is particularly effective in applications where traditional nuts and bolts may not provide the same level of retention or may be prone to loosening due to vibration.

Their permanent nature differentiates them from other fastening methods that allow for disassembly, making lockbolts especially useful in aerospace applications where safety and structural integrity are critical. The combined advantages of both rivets (like a solid, permanent connection) and bolts (such as easy installation and high strength) make lockbolts an optimal choice for various manufacturing and assembly processes in the aerospace industry.