Nut M12 x1.5 WS=19 flat type (used for crankshaft/primary gear Vespa V50, V90, SS50, SS90, PV125, ET3, PK S, PK XL) - tensile strength=10

Developed for performance-oriented engine concepts.
The fixing should be done with Loctite medium strength WITHOUT a locking plate. The recommended tightening torque is 55-60 Nm.
Tested and approved in racing use.
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