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and the M2 HSS construction delivers reliable wear resistance for longer tool life in demanding finishing passes
The "Second Lead" configuration means the cutting action starts more gradually
Bottoming lead: enables full-thread depth to the bottom of the hole for maximum engagement and strength
21 mm reamer gives you precise
Precise metric sizing: M19 x 1
JBO Plug Gauge - Metric (STI) Heli Coil Gauge - Right Hand - 6H - M7 x 1 - Calibrated (DAkkS Calibration) Power Milling Chucks and the M2 HSS constructionThe JBO Plug Gauge Metric (STI) Right Hand, 6H, M7 x 1, Calibrated with DAkkS is a precision inspection tool designed to verify metric screw thread inserts (STIs) used across manufacturing, automotive, and aerospace environments. Built to ANSI ASME standards, this gauge provides reliable, repeatable measurements with a traceable calibration, giving QA teams and technicians the confidence they need on the shop floor. Exact Metric STI fit (M7 x 1):
