Only one out there
This part looks well made but DO NOT over tighten this cap or the top will snap right off leaving you stranded on the lake. The cap is cut too deeply to allow space for the gasket and it leaves the top vunerable to break to easily. You cannot buy just the plastic cap but must pay $50.00 for the new assembly and I found nothing else that will work. When your cap starts to leak, just tighten it to snug or it will break. If it still leaks, buy or make a new gasket and try a snug fit again. Personally, I think this cap is poorly made and someone could make good money outsourcing an after market cap that is stronger. Brass would be nice. I now carry a recycled ketsup bottle top for a spare.
Verified purchase: YesCondition: New