SPECIFICATIONS Adapter Type Tee Description Keyword 3/8 in Male Flat Face O-Ring x 1/2 in Male Adjustable O-Ring Boss x 3/8 in Male Flat Face O-Ring End 1 Style Male Flat Face O-Ring End 2 Style Male Adjustable O-Ring Boss End 2 Thread (SAE) 3/4–16 End 3 Size 3/8 in End 3 Style Male Flat Face O-Ring