I am trying to insert hex head bolts to DIN 7968 into an assembly, however I can only add washers / locks onto the bottom stack but what I cannot insert are nuts. Does anyone have a solution to this please?
You need to change the configurations within the Toolbox (Tools > Toolbox > Configure). Then go to section 5 "Configure Smart Fasteners" and change the standard (in my case I changed it to DIN > Bolts And Screws > Hex Bolts And Screws > Hex Bolts Grade C DIN EN 24016).
This worked for me and I am presuming it will work for any standard you chose as your default bolt / screw.