Countersink Holes Chart for Drilling Wood Screws | Drill Bit Size Guide
Is there a chart showing the proper pilot hole for sheet metal screws? I know, or think I know, 1/8' for a #8 screw, but what about #4, #6,#10, #12? - Quora
Screw Dimensions – Blacksmith Bolt & Rivet Supply
No 8 x 3/4" Hex Pin Countersunk Security Self Tapping Screws - A2 Stainless Steel