What stantdard are you use for screws bolts? Asme B16.5 or ASMEb18.2.1. I have a catalogue where ASME B18.2.1 doesn't appear.
Help me please with some advices.

Hello Adrian

Actually we have a number of bolt standards. They are TEMA, UNC, TEMA metric, BS 3643, and SABS 1700 (South African). Our software is used all over the World and for many of our users, the metric bolts are of interest. We do not specifically address ASME B16.5 or ASMEb18.2.1.

If you wish to enter a particular root area for the bolts you can do so as a ‘user root area’.

There are many standards for bolts. We cannot cater for them all, otherwise the list would be enormous.

I hope this answers your question.