Hey all, I am working on a couple big projects.  One of them has numerous small pieces and a lot of them are bolts.  I have silicone caps that I am putting on the threads but wrapping a wire around the silicone does nothing for the ground.

 What I had to do is bend the bolt around til just a corner of the head was touching the hanger.  This works but leaves mark off and was ok for the 2 bolts I have.  In the future we are talking about 200 bolts at a time.

 Any suggestions on a good efficient way to coat a lot of bolts at the same time, have the threads covered, maintain a ground, and have no markoff on the bolt heads?

 Thanks guys!

I haven't tried this myself with PC but when I've painted bolts, I punched holes in a piece of cardboard and pushed the bolts through. I used a backing piece offset from it to keep the bolts at the same level. For powder coating, cardboard won't do. How about a piece of sheet metal with enough holes for a batch. Make the holes larger than the largest bolt, lay foil over the holes and push the bolts through the foil to hold them and maintain the connection. You could build a shallow box with the holes on top and a solid back to set the depth. Maybe even make it adjustable for varying lengths. 

  I'm really sorry for the delay in answering this.  Our system is supposed to notify when we have a question, but it's apparently not working correctly.

  Wire mesh or metal with holes drilled in it are probably the most common way it's done.  Cardboard doesn't work as well because of the grounding issues but the mesh seems to work well.  It's a little labor intensive, but you should be pleased with the quality.