JBO Thread Plug Gauge (GO) - Metric Coarse - Right Hand - 6H - M42 x 4.5 Boring Bar Blank Designed around the OZ32 interface

Designed around the OZ32 interface

repeatable bore sizes for mating parts and assemblies

Its rigid tapping design delivers consistent thread formation

The Toolex HSS-E Countersink features a 3-flute

Its straight shank offers flexible integration with different machining setups—bench units

JBO Thread Plug Gauge (GO) - Metric Coarse - Right Hand - 6H - M42 x 4.5 Boring Bar Blank Designed around the OZ32 interfaceThe JBO Thread Plug Gauge (GO) is a precision inspection tool designed to verify metric coarse internal threads. Built for machinists, quality control professionals, engineers, and maintenance teams, it provides a simple, reliable pass fail check to ensure holes meet the M42 x 4. 5 standard with a 6H tolerance. Designed for use in busy workshops, it helps you confirm thread quality quickly and with confidence. Metric coarse thread GO gauge for M42 x