Screw Diameters and Pilot Holes
Many screw types require a pilot hole to be drilled before they are installed.
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Product Resources
Hex Bolt, Nut and Set Screw Across the Flat Sizes
This resource provides the Across Flat Sizes (AF) of both metric and imperial hex bolts, nuts and set screws.
Screws – Head Types, Drive Types, and Drill Points
In this resource you can learn more about the different screw head types, drive types and drill types for all your project needs.
Key Steel – Standard Information
This resource provides the standard information for both SUS304 and S45C key steel.