Holley bowl screw thread size
I am rebuilding a pair of old Holley Dominator carbs.
One has had several Helicoils added for the bowl screws and one thread is about stripped out and needs a helicoil. I know Holley sells a kit for this with tap, install tool and inserts, #26-2.
I would like to know what the original thread is so I can get a tap and die for that size. I am thinking it is 12-24 thread but haven't found if that is true anywhere. A couple of the helicoils wont let the screw start so I thought I might be able to run a tap thru them and also dress up the screw threads themselves. I might find the Helicoil kit cheaper in the Mcmsaster Carr catalog too if I knew the size.