Used on 1982-current E-Z-GO Electric Vehicles and 1982-1993 2-Cycle Gas Vehicles.This hub/drum is a replacement for the earlier (before 1982) hub drum andhas the star spline instead of the straight keyHas a 3/4-Inch center hole with a 24-tooth star spline.The drum is held in place by a castellated nut (5/8-Inch x 18tpi) and a thick (.118-Inch) flat washer.Product Description Golf Cart Brake Drum/Hub Assembly (Electric) for EZGO TXT Golf Carts Replace# 19186G1