Mustang Seats Specialty Seat Screw For Modern Harley Fender Nuts Dress up your rear seat mount with this custom-designed screw. Machined out of 303 stainless steel for great looks and durability. Threaded at 1/4-20 x 1/2 to fit modern H-D fender nuts. Features: Machined from 303 stainless steel for durability Threaded 1/4-20 x 1/2 Can be turned by hand or 5/32 allen wrench 9/16 Diameter Head