I have a an M8 and an M6 helicoil set both have taps market ST followed by what I believe is the finished thread size when the coil is inserted. I also have a 5/16" BSF insertion tool and a set of inserts (for a very long time!) I seem to have lost the tap in all my taps so am I looking for a tap marked ST 5/16 BSF? also can anyone tell me the drill diameter for a 5/16 BSF Helicoil tap?
I guess I was in a tidy up too much mood sometime back
I guess I was in a tidy up too much mood sometime back