We currently offer a variety of different size bulkhead fittings.
All bulkhead fittings are threaded on the inside of both ends. In bulkhead lingo this is referred to as 'thread x thread'. All Bulkhead fittings come with a single washer. One of the most common questions is "So if the interior of the bulkhead is the size of the pipe I'll be screwing into it, then what size hole do I need to have?":
Made in the USA