![Standards Regarding Counterbore Clearance Holes for Various Screw Types - ANSI (standards) Code Issues - Eng-Tips Standards Regarding Counterbore Clearance Holes for Various Screw Types - ANSI (standards) Code Issues - Eng-Tips](https://res.cloudinary.com/engineering-com/image/upload/v1622039770/tips/image_uvglsl.png)
Standards Regarding Counterbore Clearance Holes for Various Screw Types - ANSI (standards) Code Issues - Eng-Tips
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
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
![Timberline 608-116 Quick Release Countersink for No.10 Wood Screw Size by 1/ 8-Inch Diameter by 3/8-Inch Carbide Tipped Hex Shank : Amazon.co.uk: DIY & Tools Timberline 608-116 Quick Release Countersink for No.10 Wood Screw Size by 1/ 8-Inch Diameter by 3/8-Inch Carbide Tipped Hex Shank : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/411gyEFjR6L.jpg)