JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M12 x 0.5 Face Mill Arbors Its robust geometry supports repeatable

Its robust geometry supports repeatable results

enabling accurate reproduction of complex curves and improved surface finish

repeatable hole finishing in professional workshops

while the H5 tolerance guarantees tight bore control across parts

and workshop teams who need reliable pass/fail checks on hole size to keep assemblies precise and on spec

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M12 x 0.5 Face Mill Arbors Its robust geometry supports repeatableThe JBO Thread Plug Gauge is a left hand, metric fine thread Go No Go gauge designed for precise inspection of threaded holesspecifically M12 x 0. 5 with 6H tolerance. It helps engineering teams, machine shops, and maintenance crews quickly confirm that holes will accept mating parts without guesswork, boosting first pass quality in every run. Go No Go quick checks: A simple pass fail test for threaded holes lets you verify acceptance in seconds,