Originally Posted by eyebrowski
1/8 NPT maybe?
no, it's a special socket designed for chrystler only sending units. you can use a metric (18 or 19), but it's not a direct fit and if it's on there good you'll round the corners. i had to 'borrow' a special socket for mine....didnt want to come off.
but if you're talking about the metal part that's attached to the metal part that actually screws into the oil filter adapter...that's a standard pipe fitting...NPT, and i'm thinkin maybe 1/4 or 5/16.