VCOIL Plug Gauge (D/E) - UNC (STI) - Heli Coil Gauge - Right Hand - 2B - 1/4 x 20 Power Milling Chucks smoothly finished threads across a

smoothly finished threads across a wide range of standards

providing reliable reach without compromising rigidity

repeatable hole finishing for metalworking projects

supporting repeatable fits across production runs

expanding its usefulness in tight radii and deep groove work

VCOIL Plug Gauge (D/E) - UNC (STI) - Heli Coil Gauge - Right Hand - 2B - 1/4 x 20 Power Milling Chucks smoothly finished threads across aThe VCOIL Plug Gauge (D E) UNC (STI) Heli Coil Gauge is a precision go no go thread gauge for 1 4 x 20 UNC helicoil applications. Designed for right hand threads and 2B class tolerances, it quickly verifies that insert threads meet ANSI ASME standards with a hand screw test. Thread standard: ANSI ASME UNC 1 4 20 threading; compatible with helicoil insert processes (STI). Go No Go design: Combined go and no go plug gauge with a red ring scrap side for