Most ignition key switches have a 'D' shaped body so they don't rotate when you turn the key

and two 5/16"-18 mounting bungs

motorcycles 1964 - 1970

1/4" NPT fittings

This weld-on

Reinforced Translucent Fuel Line - Clear - 1/4 inch ID Color_Clear Most ignition key switches have3' of Reinforced Clear translucent fuel line, 1 4" inner diameter, 3 8" outer diameter, perfect fit for your standard petcocks. This piece is enough to cut in half and use for two petcocks with a piece left for a balance tube. The same great quality polyurethane as our traditional fuel lines but in a double layer with nylon reinforcement to accommodate pressures of 200 PSI.