The studs are 5/16" diameter

and the stock style finned exhaust clamps

The supplied 5/16"-18 x 1" chrome button-head allen nestles right in and looks killer

steel foot peg clevis mounts allow you to use H-D style OEM or aftermarket pegs and mount them in any location you choose

Screw-In Harley Stock Style Vented Gas Cap - 1996 & up - Chrome Color_Black The studs are 5/16" diameterThese thread in screw in style gas caps are vented and feature a chromed steel finish. Get rid of that rattle from your stock gas cap and replace it with this quality replacement. Fits Harley Davidsons and aftermarket tanks with screw In style gas caps, 1996 & up. This is an alternative replacement for OEM # 61102 83A. See Additional Information below for fitment.