Drill America 11/16"-20 HSS Plug Hand Tap

11/16"-20 HSS Plug Hand Tap

This 11/16"-20 high-speed steel plug hand tap is designed for cutting internal threads in through holes. It suits professional machinists and maintenance technicians who need a reliable tool for general machine or CNC tapping operations. The plug style provides a balanced starting taper for efficient thread engagement in a variety of common materials. Buyers who need to thread blind holes to the bottom will require a bottoming tap instead.

Plug Style Through-Hole Limitation

The plug style is generally used for through holes and features a moderate chamfer that starts threads squarely with the workpiece. It is not designed to cut threads to the full depth of a blind hole, limiting its use in applications where threads must extend to the bottom. Users tapping blind holes must switch to a bottoming tap to complete the thread depth, adding a tool change to the process.

Installation And Common Issues

The tap can be operated by hand using a suitable tap wrench or mounted in a machine for powered tapping, offering flexibility across workshop setups. Proper alignment is critical; starting the tap square to the workpiece prevents cross-threading and premature wear. Using appropriate cutting fluid reduces friction and extends tool life, while clearing chips regularly avoids binding and tap breakage during deep cuts.