High-Performance Thread Mills Selection Guide • Solid Carbide Thread Mills Victory™ GTM Series HP Solid Carbide Thread Mills • Metric  Good  Better size range  Best (inch and metric) GTM Series Solid Thread Milling • Metric series sizemin–max hole operation coolant grade shank GTM11 M3–M20 WU13PV 6535 HA GTM21 M5–M16 WU12PV 6535 HA GTM31 M4–M16 WU12PV 6535 HA GTM41 M6–M24 WU16PV 6535 HA GTM41LH M6–M12 WU16PV 6535 HA Victory GTM Series HP Solid Carbide Thread Mills • Inch  Good  Better size range  Best (inch and metric) GTM Series Solid Thread Milling • Inch series sizemin–max hole operation coolant grade shank GTM21 #10–5/8" WU12PV 6535 HA GTM31 1/4–5/8" WU12PV 6535 HA GTM41 1/4–3/4" WU16PV 6535 HA Y66 widia.com High-Performance Thread Mills