What is this tool thread? Take a guess. Stump the Toolman!

halifaxhops said
I use the heck out of them doing distributors!

I bet. Those little screws don't belong down below the breaker plate. I have a few in my ignition drawer anong with feeler gauges and the like. I used to have a bunch of those little grease capsules but I have used them all up throughout the years.