The LN94-20025 Split Pin is a safety locking fastener used in aircraft mechanical assemblies. It is designed to secure castellated nuts, clevis pins, and other fasteners by preventing rotation or loosening under vibration and operational loads.

The pin is inserted through a pre-drilled hole in a fastener and then its legs are bent apart to lock it in place, providing a simple but highly reliable mechanical retention method.

Its primary functions include:

Locking nuts and fasteners in position to prevent loosening
Providing mechanical safety retention in aircraft assemblies
Ensuring reliability under vibration and cyclic loading

Split pins like the LN94-20025 are essential low-cost safety components in aviation, widely used wherever secure mechanical locking is required without adding significant weight or complexity.