Posted by Vaughn [172.70.214.83] on Sunday, January 02, 2022 at 10:26:38 :
In Reply to: Oil gauge fitting specs posted by Justin from South Jersey [172.70.114.83] on Saturday, January 01, 2022 at 17:49:00 :
It is an Inverted Flare Nut for 3/16 line. The standard 3/8-24 thread is not correct. Using a SAE thread gauge for bolts works out to 3/8-27 thread which may be close to pipe thread.