US Bolts Head and Wrench Sizes Engineering ToolBox
US Hex Bolts Inches ANSI ASME B18 2 1 Dimensions of Hex Bolts Imperial units US Hex Bolts Metric ANSI ASME B18 2 3M Dimensions of Hex Bolts Metric units US Machine Screws Dimensions Machine screw diameters Wrench Spanner Inches vs mm SAE to metric wrench or spanner converting chart