FEATURES A -6an O-RING BOSS FITTING WITH JAMB NUT AND A STANDARD FLARE -6an FITTING ALONG WITH SMALL PLUG PORT THAT HAS A -3an CAP. THIS IS NOT A BYPASS VALVE, BUT A 1 WAY SHUT OFF. YOU CAN USE IT TO BLOCK OFF THE FLOW TO ANY -6an FITTING OTHER THAN WRIST PIN OILERS.