Piping > Setting Up Fittings > Spec-Driven Fitting Insertion > About Bolt and Nut Bulk Items
  
About Bolt and Nut Bulk Items
Bulk items created using the following parameters, relation, and Family Table are used to represent bolts and nuts in a piping assembly.
Parameters
Add the following parameters to the bulk item:
Name
Type
Value
User Input
BOM_REPORT_QUANTITY
Real number
0.0
No
QUANTITY
Integer
0
Yes
BOLTNUTFACTOR
Parameter sum
0.0
Yes
BOLT_DIA
Real number
0.0
No
BOLT_LENGTH
Real number
0.0
No
The values of the BOLT_DIA and BOLT_LENGTH parameters are exported to the PCF file.
 
* After a bulk item is placed in an assembly, a parameter requiring user input behaves as a component parameter. For different instances of a Family Table member, the bulk item can have different values.
Relation
Add the following relation to the bulk item:
BOM_REPORT_QUANTITY = BOLTNUTFACTOR * QUANTITY
Family Table
Create a Family Table for the bulk item with the following columns:
• Instance name—Name of the bulk item in the Bolt Nut Master Catalog file
• BOLT_DIA—Diameter of the bolt
• BOLT_LENGTH—Length of the bolt
Inserting Bolts and Nuts Automatically
When you insert a fitting in a piping assembly, you assign a bolt nut code as a fitting parameter. The bolts and nuts that match this bolt nut code are automatically inserted as bulk items in the assembly. The following parameters are used to select the correct bolts and nuts for the fitting from the Bolt Nut Selection file:
• SIZE—Fitting size
• SCH_RATE—Fitting rating
• BOLT_NUT_CODE—Bolt nut code assigned to the fitting
 
* When you create a report, the bolt nut codes from a valve always take priority over codes from a flange mated to the valve. For example, when a valve is mated to two flanges, only the bolts and nuts assigned to the valve are reported. The bolts and nuts assigned to the two flanges are ignored.