This hand tap is ideally used at the start of the thread cutting process. Mainly used for cutting threads in steel but can be used for other materials. (Also known as a taper lead or 1st Tap).
This hand tap is ideally used at the end of the thread cutting process. Can also be used for blind holes. Mainly used for cutting threads in steel but can be used for other materials. (Also known as a Bottoming Tap).