The bolt assemblies can be changed within the Global settings.
The assembly of a bolt determines the standards of the bolt, washers and nuts. It also determines the tolerance of the hole and the like.
A summary of all existing assemblies is shown in the top left-hand side of the dialog window. Clicking on one of the assemblies will display all of its settings. These settings can be changed and then saved by clicking on Apply. If another assembly name is assigned to the assembly, click on Apply, and a new assembly with that name will be created.
The standards of the bolts, nuts and washers can be set within the dialog window. The standards selected will be taken directly from the Bolt parts database.
With the nuts and washers a selection may be made between not, yes, never or always. When you choose yes or not, you will be able to enable/disable them while drawing, when you choose always or never, you will not be able to disable/enable them while drawing.
The added length can be made diameter dependent. The added length is to make the bolt longer than is actually necessary. A good example of this is the anchor bolt: which only needs to pass through a footplate, but must actually be much longer.
The added length and the hole-tolerance can still be changed while drawing, as can the turning on and off of washers and nuts.
This is the sequence for drawing a new bolt:
1) A new bolt is drawn, but it has to be assigned a assembly and a diameter.
2) Parabuild searches within the selected assembly for the standard for the bolt, washers and nuts that should be used.
3) Using this standard, Parabuild consults the bolt parts database, and selects a bolt using the following details: Standard, diameter and length (length = penetration length + washers + nuts + added length).