Need A #4-40 Thumbscrew



No, not the medieval torture instrument. There is a little set screw that holds eyepieces in place on my telescope. It's about 1/4-1/2 inch long, with a knurled head that makes it easy to tighten down on an eyepiece. A few months back, this little thumbscrew fell in the deep grass in my back yard, and has been MIA ever since. I am using a #4-40 screw as a replacement, but it's not quite as convenient. Unfortunately, local hardware stores don't carry anything quite this small with a knurled ending, or any other sort of easy to turn head on it. If you have one that fits this description sitting around your workshop--or can tell me where to buy one--I would very much appreciate it.