Thread: Where to buy an 8-40 forming tap (or set)

They are used in a lot of other things as well like US-spec diving gear - also some parts on certain US made bikes and motor parts. Also electronics and boat parts like control levers and some small pump fasteners so the size isn't that uncommon. Easier to buy the taps than the damn screws I thought! I got my last set from Bay Engineers off the shelf for what it's worth.