Gun Screws Unlimited; With Drill Press & Dies You Can Make Most Gun Screws
All that is needed is a die with the right threads to make a vast variety of gun screws simply and immediately! You will also need a file, and either a drill press or a pin vise. You can give them any thread length, any overall length and any head thickness desired. Blanks are made of easy-to-thread, tough, forging steel. If hard wearing surface is desired after threading, screws should be treated in Brownells Surface Hardening Compound (#083-000-033).
Big Book Catalog, Issue:65, Page:391
SPECS: Kit contains: 20 each of No. 4 Head - O.D., .220" (5.6mm); No. 6 Head - O.D., .265" (6.6mm): No. 8 and No. 10 Head - O.D., .303" (7.7mm); No. 12 Head - O.D., .355" (9.1mm); 1/4" Head - O.D., .398" (9.9mm). Shank length on all sizes is 2.225" (5.65mm), measured from the underside of the head. All screws are pre-slotted. Refiills sold 20 per pak.