A technical drawing of a UN Multitooth Staggered Tooth carbide head Thread Mill with dimensional callouts

UN Multitooth Staggered Tooth: Carbide Head

Achieve versatility and performance with our UN Multitooth Staggered Tooth Carbide Head Thread Mills, designed for precision threading across a wide range of applications. Built with a durable steel shank and a replaceable solid carbide cutting head, this modular tool offers cost efficiency without sacrificing accuracy. The non-crest cutting design enables clean and reliable machining of both internal and external threads, while reducing tool pressure and enhancing thread size adjustability. Capable of cutting UNC, UNF, UNEF, and UNS threads, as well as UNJ threads (internal only), this thread mill is ideal for aerospace, medical, and general machining applications. The staggered tooth geometry ensures smoother cutting, excellent chip control, and longer tool life. Available uncoated or with advanced AlTiN+ coating for superior heat resistance and performance in hard-to-machine materials.

Minimum ID Thread/Pitch
A (Tool Diameter)
B (Length of Cut)
Q (Length)
S (Shank Diameter)
OALFlutesUncoated Tool #Uncoated EDP #AlTiN+ EDP #
7/16-160.3500.7830.0360.75064TM350-16102705102747
7/16-180.3500.8070.0320.75064TM350-18102708102750
7/16-200.3500.8230.0270.75064TM350-20102711102753
7/16-240.3500.8560.0240.75064TM350-24102714102756
5/8-120.5001.0420.0460.75064TM500-12102717102759
5/8-140.5001.0370.0400.75064TM500-14102720102762
5/8-160.5001.0330.0360.75064TM500-16102723102765

*TM500-12, TM500-14, and TM500-16 have coolant through holes.