Well, I finally received the screws from East Taylor, LLC (1101 Anderson Rd., Statesboro, GA 30458). The are and exact fit and same size as the originals. I measured them with dial calipers and screwed them into my original Winchester bayonet adapter. I also compared them against original screws. These screws are a number 10 by 36 tpi. I looked through many machinery and maintenance catalogs and they are not availible any where that I could find except from East Taylor. This screw pitch and size are not even listed in the "Machinery's Handbook" which is the machinists bible.They cost me $30 ($10 each) plus $3 shipping. And I am glad to have them! So "hats off" to the folks at East Tayor LLC!