Spark Plug Socket
Thought I had resolved matter -oh no
Socket size needed for a 12mm plug is actually 18mm
picked up a couple of sockets (1/2 " square drive) 1 being a proper spark plug socket for a 12 mm plug and one being a 18mm deep socket.
Result,both sockets screwed plug almost all the way in but lifted up of the hex when tightening due to narrowing of apperture toward bottom of hole.
So now I am waiting to get the sockets ground down externally to make them thin wall,then hoefully I can tighten them and apply my torque wrench.
Eventually one for my boat tool kit and the deep socket for my garage toolkit