Golan, low profile tank fitting 22mm with nut. Brass Fits: > 75-06 Bigtwin and XL Sportster 

5/16 (8mm) hose fitting; side outlet. These brass fittings will take a minimum of space, enabling you to connect your fuel line to the gas tank, when a regular petcock just won't fit. Can be used in combination with the Golan Gas Tank Selector or with an in-line fuel valve.

Fits: > 75-06 B.T., XL (exclude. inj. models); customs with 75-up style threaded tanks