First aid refers to the immediate care given to an injured or ill person until full medical treatment is available. You might perform CPR for cardiac arrest, apply pressure to stop bleeding, or use an ...

Cross threading occurs when the bolt is misaligned with the threads in the nut. It can destroy the threads, or cause the nut to jam. The standard beveled end process makes cross threading a ...

Functions and modules for creating metric (ISO) and English (UTS) standard screws and nuts. Included is a function for calculating the standard dimensions of screws including the tolerance values that ...