This pair of Bungee Nuts are similar to Harley-Davidson OEM# 98185-90T, except they feature 5/16"-18 threads. High quality chromed steel with an internal 5/16"-18 thread allows you to mount these in stock location or on any 5/16"-18 bolt or stud for endless custom mounting options. A huge help when trying to figure out how to secure gear to your motorcycle!