JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6H - M39 x 0.75 Boring Bar Blank reducing inspection time and eliminating

reducing inspection time and eliminating guesswork during setup or rework

it is built for through-coolant reaming and holds ISO H4 tolerance (D) under DIN 8093

Ground: Hollow-ground to bore for side clearance

The sealed design minimizes coolant mess

and extends tool life in demanding jobs

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6H - M39 x 0.75 Boring Bar Blank reducing inspection time and eliminatingThe JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. Specifically crafted for M39 x 0. 75 applications, this right hand, Go No Go gauge helps shops verify threaded holes quickly and reliably. Its ideal for machinists, assembly lines, and QA teams that need fast, accurate fits without guesswork. Made from hardened steel for exceptional durability, this plug gauge resists wear and maintains accurate measurements