With two applications this Bulb(12v21w) is the most specified part.
A sample from the products for the Turnsignal Lamp (sv650k8/ak8) include: Screw, Lamp Assy,rr Turnsignal,l, Nut, Relay Assy,turnsignal Lamp.
Of all the components that make up this Turnsignal Lamp (sv650k8/ak8) the Screw has the lowest price.