VCOIL Plug Gauge (NoGo) - Metric (STI) - Heli Coil Gauge - Right Hand - 4H - M39 x 4 NCDC Drill Chuck 97 mm HSS‑E stub reamer

97 mm HSS‑E stub reamer designed to finish holes to exact size with a clean

Teeth: 100 teeth (fine pitch for smooth

it’s ideal for small radii

accurately sized holes in metalwork projects

53 mm hole size within ISO H5 tolerance

VCOIL Plug Gauge (NoGo) - Metric (STI) - Heli Coil Gauge - Right Hand - 4H - M39 x 4 NCDC Drill Chuck 97 mm HSS‑E stub reamerPrecisely engineered for helicoil and insert applications, the VCOIL Plug Gauge (NoGo) verifies M39 x 4 threads to metric STI standards. Right handed and 4H class, its built for manufacturing environments that require reliable go no go verification of thread quality. Thread size and class: M39 x 4, 4H tolerance, metric (STI) standard Go No Go design: Combined go plug gauge and no go plug gauge; go end threads into the cut by hand with controlled