What does a Hi-Lok fastener consist of?

A Hi-Lok fastener consists of a threaded pin and a locking collar. This design is specifically engineered to provide a strong and secure connection in aerospace applications, where the integrity of the fastening system is crucial due to the extreme conditions encountered in flight. The threaded pin allows for the fastener to be tightened properly, ensuring that components remain securely attached, while the locking collar prevents any unintentional loosening that could result from vibration or other forces during operation. This combination is vital in maintaining the stability and safety of aircraft structures, making the Hi-Lok fastener a favored choice in the aerospace industry.

The other options do not accurately represent the design and functionality of a Hi-Lok fastener, which is why they are not suitable answers.