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Moroso 1-1/4in-12 thread filler cap O-ring is a replacement sealing gasket sized for 1-1/4in-12 threaded filler caps and necks. The O-ring restores a proper seal when servicing or replacing filler caps and is intended for systems that specify the 1-1/4in-12 thread form. It’s a simple maintenance part to prevent leaks at the filler interface.
Moroso 1-1/4in 12 Thread Filler Cap O-Ring
