im in search of a m20x1.00 metric to AN adapter for the coolant port on the side of the head, has anyone had any such luck finding one? i cant find one anywhere for the life of me.... HELP!!

 

Use the Hex plug for the vtec valve rocker arms.
Honda Part #'s
12208-PR3-000 20mm Sealing Bolt
12209-PR3-000 20mm Sealing Washer

They are the right piece to use and keep it low profile. They are a 10mm Hex Socket.

 

that hole is about the same size as 1/2 npt, i tapped it to that and used a plug in it. you could tap to 1/2 npt and then get a AN adapter for it.