Solidworks Tutorial: Create Hole Wizard with Polygon Sketch at Flange Model
Channel: Langgeng Wahyu Hidayat
Date: 2011-10-05

http://3dcadmodel.blogspot.com
Create flange model with Revolved Boss command. Then use Polygon Sketch as Hole Wizard placement. Don't forget to set cosmetic thread view with choose Tools, Options, Document Properties, Detailing, shaded cosmetic threaded. Enjoy it!