So I'm working on a brake swap and need info on the caliper slider bolts thread pitch. I tried matching it up to the thread wall at the local lowes and come to the conclusion it is a 7/16 bolt but the thread pitch is what is stumping me. The wall had a 14 tpi and a 20 tpi. I used a thread per inch gauge and found it to not match 20, 18, 16, or 14 threads per inch. none of the taps that are available from grainger suggest that 18, 16 tpi's are even available. So did GM use some sort of magical mystery tap thats proprietary to them? Is my bolt stretched? Thanks for the help.
------------------ ARCHIES JUNK IS FASTER THAN SHAUNNA'S JUNK 12.3 is faster than a 13.2