Additional Bolting Items in Bolt Length Calculations

Once the accumulated flange and wafer thickness has been calculated, the lengths of elements such as nuts and washers must be added; see the image below.

The bolt SPCOM SBOLTs have the attribute BLIST which is a real array of lengths corresponding to the BITEMS array. Each individual length may take an actual value or be set to zero. BLIST may have more lengths than BITEMS has selectors, allowing lengths to be taken into account without further selection of material, for example, if nuts are included in the bolt description.

The extension thread length will be taken from the XLEN attribute of the SBOLT and added to the calculated length.