1/2 Outer Diameter X 7/8-20 Unified National Fine X 3/8-18 Female Iron Pipe Bulkhead AdapterThe 1 2 Outer Diameter X 7 8 20 Unified National Fine X 3 8 18 Female Iron Pipe Bulkhead Adapter is a durable, reliable solution to connect tubings through walls, tanks, or other enclosures. It features a 1 2" tube OD on one side and a 7 8" FNPTF on the other. With UNF threads, it provides a more precise and tighter fit than standard threads, ensuring superior sealing capabilities for high pressure systems. Made from brass, this adapter offers