Threaded Holes Guidelines

Our CNC machining service provides the ability to easily add threaded features to milled and turned parts. Threads are specified within our automated

interactive quotes. When a quote is returned, the 3D display will show which thread types are possible for each feature. Different threads (where possible) 

or no threads can be selected on a feature-by-feature basis. View a sample quote to explore a 3D model with threads.

Milled vs. Turned Parts
We offer a limited selection of UNF, UNC, and metric threads for machining along with coil and key inserts (but do not supply or install the inserts). On both milled and turned parts, threaded holes must be modeled at the proper diameter, however, threading options differ for milled and turned parts. Automatic external threads are not available for milling at this time. It is possible to machine approximate external threads using ball and flat end mills if threads are modeled and are at least ½-13 (M12) or larger. Threaded holes on turned parts are also available and external threads are offered on the axial diameters. Simply model the nominal diameter; do not model the threads.

All of our available selections are listed in the guide below. If you have any issues or questions please contact an applications engineer at [email protected].