Specification data for U.S. and metric screws, in one place
The iengineer mobile app provides a comprehensive database of screw and bolt information, for a large array of U.S. and metric screws. It provides access to key dimensional data and specification information for several hundred U.S. and metric screws (with 9 different screw head styles). It also provides information about hundreds of drill bit sizes, tap sizes and more. Strength and torque information is included for 29 different materials, and data for allowable shear force are also provided. It includes a chart to convert between fractions and decimals. — iengineerapp