Have a couple of 8-40 scope base threads in a receiver that are slightly messy. Would like to clean them up.
Tried to no avail to purchase tap in local hardware.
Several sources suggest an el-cheapo way of chasing: cut two small grooves in the end of a screw with the same thread size as those you want to chase. Leave the burr on the cuts. Thread the cut screw into hole with damaged threads.
The people talking about this trick are not gunsmiths or machinists.
What say you experts about this trick? Sounds risky to me.
I can afford to buy and wait for shipment on the 8-40 tap if that is advised.
Thanks.
PBSmith