VCOIL Plug Gauge (NoGo) - Metric (STI) - Heli Coil Gauge - Right Hand - 4H - M39 x 3 Tiny Tool Inserts and help you consistently meet

and help you consistently meet threading standards across manufacturing

crafted from hardened steel for lasting accuracy in demanding environments

designed to streamline setups

this intermediate-precision reamer is designed to finish holes with consistent diameter and a smooth finish

Material: Carbide construction delivers sharp edges

VCOIL Plug Gauge (NoGo) - Metric (STI) - Heli Coil Gauge - Right Hand - 4H - M39 x 3 Tiny Tool Inserts and help you consistently meetVCOIL Plug Gauge (NoGo) is a precision metric thread gauge designed for helicoil inserts, combining Go and No Go checks into a single, reliable tool. Its ideal for machinists and quality labs working with STI metric threads to verify correct engagement. Thread system: Metric (STI) with M39 x 3 right hand threads and 4H tolerance. Go No Go gauge: Integrated go end that threads in by hand and a no go end that must not thread in more than two turns.