Gary Fowler
Super Star Member
- Joined
- Jun 23, 2008
- Messages
- 11,998
- Location
- Bismarck Arkansas
- Tractor
- 2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010
I would go with a bronze or brass female threaded cap for the tank. It wont gall to the threads like aluminum to aluminum would. I think if you look at truckers tanks, that is what you will find most of the time. I would just weld in a Schedule 80 aluminum pipe nipple with NPT threads on the end and cap with the bronze or brass cap. You could likely find a cap first then match the filler neck to your cap size. A straight side threaded cap with rubber gasket would be preferable to a tapered thread. You should be able to find those at a truck supply