A 6061 aluminum weld-in filler neck with 225 series 5 TPI modified buttress threads. Weld it into your tank and top it with our Boyd 225 series cap below.
Specifications
Product number: 27027
Material: 6061 aluminum
Thread: 225 series (2-1/4"), 5 TPI modified buttress
Note: Aluminum threads cross-thread and gall easily. Start every plug and fitting by hand and never install them dry. Thread damage from dry-fitted plugs or hardware isn't covered under warranty.