I was asked to produce some nuts for a carlift, the thread is M39 x 4mm pitch. I was inclined to make a threading bar using a TCMT 16T302 insert. However, having used APT before, I found they had a 25mm dia R22 bar for £28+VAT, also 22IR 6UN tips were on offer too. Too good an opportunity to miss so I ordered that afternoon. I was absolutely amazed that I received said bar and tips the following day. I can only praise their(APT) brilliant service. Thank you.
