ABOUT THIS CATEGORY
Imperial hand taps are hand held devices used to cut an internal thread in an existing bore. An appropriate tap wrench is used to clamp and turn the taps through a bore to cut a thread. With hard materials, a thread is started using a taper or roughing tap with a subtle diameter transition for minimal torque requirement. An intermediate or plug tap is then used to complete the thread and then a bottoming tap is used for finishing threads in a blind hole. These taps are available in various imperial standard sizes.