The 1/2” hex stock is machined down with a 1/2” usable hex shape at the end

The beauty of this design is that you can use it with a custom gas tank

To re-install the nut

knob-style enrichers fit S&S Super E and G carbs and are perfect the accoutrement to your bitchin' bike with a velocity stack or other custom air cleaner assembly

bolts 4051 nuts and washers used on 1948-1950 61" and 74" Twins

#2884-6 Magneto Adapter Plate Screw 1958-1962 Harley-Davidson XLCH - CAD Plated Subcategory_Motorcycle Oil Tanks The 1/2” hex stock isCadmium plated screws, OEM# 29601 48, bolts and flexloc nuts used on 1958 Early 1962 XLCH. Made in Ohio, USA.