Just like Tony said it's a pretty standard 1/4 20 screw used commonly in photographic gear that you can pick up at a camera store and even at your local hardware store (thumb screw version). Otherwise feel free to place an order for this cool looking 1/4 20 screw. http://www.dpcav.com/xcart/Monitor-Tripod-Mount-Screw-1-4-20-thread-type.htmltonylumps said:They are standard 1/4-20 mount screw.Amazon or ebay has them or a photo shop.