JBO Thread Plug Gauge (NoGo) - Metric Coarse - Left Hand - 6H - M42 x 4.5 NCDC Drill Chuck it provides a consistent

it provides a consistent

repeatable bore sizes in a wide range of metals

helping you complete jobs with confidence and precision

while the flute design supports efficient chip evacuation and reduces risk of clogging during finishing passes

accurate bore quality for demanding machining tasks

JBO Thread Plug Gauge (NoGo) - Metric Coarse - Left Hand - 6H - M42 x 4.5 NCDC Drill Chuck it provides a consistentThe JBO Thread Plug Gauge (NoGo) is a precision inspection tool designed to verify internal metric coarse threads. It is specifically sized for M42 x 4. 5 left hand threads and 6H tolerance, making it an ideal choice for machine shops, quality teams, and precision engineers who need reliable hole checks. Use it to confirm that threaded holes will accept fasteners and perform as intended in assemblies across automotive, industrial, and equipment