JBO Plug Gauge - Metric Fine (STI) Heli Coil Gauge - Right Hand - 6H - M20 x 1.5 - Calibrated (DAkkS Calibration) M&D 30mm is a high‑precision

30mm is a high‑precision

minimizing wear and maintaining measurement accuracy over time for reliable long-term performance

even in challenging miniature applications

The 4-flute design improves chip evacuation and reduces cutting forces

while the left‑hand flute supports efficient chip evacuation to minimize friction and heat

JBO Plug Gauge - Metric Fine (STI) Heli Coil Gauge - Right Hand - 6H - M20 x 1.5 - Calibrated (DAkkS Calibration) M&D 30mm is a high‑precisionThe 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