These gas tank petcocks have 1/4 inch NPT male thread that goes into your gas tank

and our drive to bring you the best parts we can

derby inspection covers on Harley-Davidson Big Twins 1936-64

The outside diameter (OD) is 9/16"

and lockwasher fits all Wideglide 1972-up

Stiletto Shock - Black - 13.5 inch - 1999 - 2017 Harley-Davidson Dyna Models Subcategory_Fabricator Bung Assortments These gas tank petcocks haveBurly Brand Stiletto Shocks were created to give your bike the attitude and suspension travel that a proper corner eating machine needs. The high performance damper is wrapped in a spring combination designed specifically to deal with subtle road noise and imperfections, while the main coil handles the big hits and controls bottoming. The result is a plush ride that's not afraid to play rough. Available in 13 or 15 for most Sportster models and 12. 5"