Install these inserts into a matching holder to cut external or internal threads on a workpiece. They are compatible with top-notch style threading and grooving systems, which use a highly-rigid clamping design, resulting in a smoother finish and superior tool life. When the edge on one face is dull, flip the insert over. Choose a holder (sold separately) with a shank size that fits your machine and workpiece setup. Larger shanks are more stable, while smaller shanks fit into tighter spaces and allow for finer cuts.

UNC, UNS, and UNF thread inserts cut a range of UN thread types and sizes. NPT thread inserts efficiently machine full-profile NPT threads.

Right-hand inserts pair with right-hand external or left-hand internal holders. Left-hand inserts pair with left-hand external or right-hand internal holders.

Inserts sold individually come packed in a clear plastic case to protect cutting edges during shipment.