Plant, Palm Tree Trunk - Short Connector, Axle Hole with 4 Inside Prongs

Reference

2536c

Plant, Palm Tree Trunk - Short Connector, Axle Hole with 4 Inside Prongs (part 2536c) is a LEGO element. CollectORbuild's catalog records it in 3 sets, including Airtech Claw Rig and Street Chopper / Trike.