These custom knurled slotted thumb screws were manufactured at 5,000 pieces using low carbon steel material with zinc clear finish.  6-32 thread was incorporated at .375" length underneath the head.  Knurled head diameter was set to .313" and head height to .188".  The slotted drive was .035" +/-.005" deep and .045" +/-.005" wide.  Our customer used these custom screws in their electronics assembly process.  Full certs were made available to our customer upon request.