Radium Engineering 8AN ORB Plug vs Radium 6AN ORB to 6AN Male Fitting

These are different parts, not two versions of one. The 8AN ORB Plug is a blanking plug that seals a 3/4"-16 O-ring boss port. The 6AN ORB to 6AN Male Fitting is an adapter that converts a 9/16"-18 O-ring boss port to a male -6AN flare. Buy the plug if you need to close an unused -8AN ORB port. Buy the adapter if you need to run a -6AN hose or line off a -6AN ORB port. Both are anodized billet aluminum from Radium and use FKM (Viton) O-rings rated for oil and fuel. Owners rate Radium's machining and thread quality highly; the main risk with either is ordering the wrong thread size.

• Choose the Radium 8AN ORB Plug if you need to seal an unused 3/4"-16 O-ring boss port, such as a spare port on a fuel block, oil block or catch can.
• Choose the Radium 6AN ORB to 6AN Male Fitting if you need to connect a -6AN hose end to a 9/16"-18 O-ring boss port.