These pins use a spring loaded ball as a locking mechanism instead of a secondary part.
Clevis Pins can be used to stop lateral movement but still allow rotation. These pins typically have a flat head one one end and a hole for use with at locking mechanism on the other end.
These pins are inserted in to holes to act as locking mechanisms.
Hitch Pin Clips
Self-Clinching Pilot Pins
Snapper and Tab-Lock Pins
Fastening Pin Sets