Thread Inserts

Thread inserts are replaceable cutting tips mounted on threading toolholders to produce or restore threads on lathes and CNC machines. They are used for internal and external threading with a consistent cutting geometry, delivering repeatable profiles, predictable surface finish, and reliable dimensional control on the final thread form.

This collection includes inserts for metric, UN, and Whitworth profiles, in right-hand or left-hand cutting, as well as options for coarse and fine pitch work. You’ll find different grades and coatings suited to steel, stainless, cast iron, and non-ferrous materials, with choices in nose radius, rake geometry, and chipbreaker style to improve tool life, chip control, and process stability.

Threading inserts are widely used by machinists, manufacturing engineers, and QC-focused production teams in job shops and industrial plants where tight tolerances and consistent thread quality are critical. Typical applications range from general machining to precision components for automotive, energy, and aerospace supply chains.