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Left‑hand spiral flute with right‑hand cutting: Geometry optimized for stable cutting and smooth hole finishes
accurate profiles: Delivers clean
clean-hole finishing for professional metalworking applications
and hobbyists seeking dependable hole finishing in demanding environments
With reliable performance and flexible use
JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6G - M21 x 0.75 G Left‑hand spiral flute with right‑handThe JBO Thread Plug Gauge is a precision tool designed for fast, reliable inspection of metric fine threads. Specifically configured for M21 x 0. 75 right hand internal threads, this Go No Go gauge helps shop floors, QA labs, and workshops verify threaded holes quickly and with confidence. With two ends designed for go and no go checks, you can determine correct thread engagement in moments, reducing guesswork and setup time. Go No Go efficiency:
