JBO Plug Gauge - Metric Fine (STI) Heli Coil Gauge - Right Hand - 6H - M20 x 1.5 - Calibrated (DAkkS Calibration) M&D so fewer reamers are needed

so fewer reamers are needed over time

Finish with a light pass to refine the thread and clear any remaining chips

even in challenging miniature applications

30mm is a high‑precision

repeatable trapezoidal threads on tiny parts

JBO Plug Gauge - Metric Fine (STI) Heli Coil Gauge - Right Hand - 6H - M20 x 1.5 - Calibrated (DAkkS Calibration) M&D so fewer reamers are neededThe JBO Plug Gauge Metric Fine (STI) is a precision go no go tool designed to verify metric screw thread inserts (STIs). Built for professionals across manufacturing, automotive, and aerospace, it provides quick, reliable checks to ensure metric STI inserts meet exact specifications. This Right Hand gauge is calibrated for M20 x 1. 5 (6H) and carries a DAkkS calibration for traceable, audit ready measurements. Calibrated with DAkkS traceability: DAkkS