JBO Plug Gauge - Metric Fine (STI) Heli Coil Gauge - Right Hand - 6H - M20 x 1.5 - Calibrated (DAkkS Calibration) M&D The 4-flute design improves chip

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

repeatable trapezoidal threads on tiny parts

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

even in challenging miniature applications

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

JBO Plug Gauge - Metric Fine (STI) Heli Coil Gauge - Right Hand - 6H - M20 x 1.5 - Calibrated (DAkkS Calibration) M&D The 4-flute design improves chipThe 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