Welcome to the Nissan Patrol forum. To post a question and to see less adds on the forum then you will have to register
first. We are an easy going friendly forum so join in the conversations and feel free to ask any questions.
Become a forum sponsor for only $20 and see no adds with faster page loading times and many extras benefits.
15.25 mm for 3/8"bsp 14.75 mm for 3/8" bspt. If your worried about the drill swarf as said above fill the drill flutes with grease and you will have no dramas, don't forget the swarf from the tap also, grease in the flutes of the tap will work there aswell. Personally I would weld the fitting into the sump.
Reply With Quote