JBO Thread Plug Gauge (NoGo) - Metric Coarse - Left Hand - 6H - M42 x 4.5 NCDC Drill Chuck A straight shank offers straightforward

A straight shank offers straightforward setup with common chucks and holders

it provides a consistent

Left-hand spiral flute with right-hand cutting: Optimizes chip evacuation and cutting stability for cleaner holes and reduced burrs

and reliable performance across a range of metalworking tasks

Flute Design: Multi-flute geometry optimizes chip evacuation and provides a stable

JBO Thread Plug Gauge (NoGo) - Metric Coarse - Left Hand - 6H - M42 x 4.5 NCDC Drill Chuck A straight shank offers straightforwardThe 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