JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M20 x 0.75 Milling Cutter Arbors accurate hole sizing in a

accurate hole sizing in a range of metals

thanks to the hard AcuRea coating and the sturdy HSS-E substrate

supporting tool sizes from 3–16 mm with a stable

and purpose-built geometry supports faster setup

The TiAlN coating helps manage heat during cutting

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M20 x 0.75 Milling Cutter Arbors accurate hole sizing in aThe JBO Thread Plug Gauge is a precision Go No Go tool designed to verify internal metric fine threads. Specifically built for M20 x 0. 75 left hand threads, it helps ensure threaded holes meet exact size and tolerance during assembly and quality checks. Constructed from hardened steel, this gauge delivers durable, repeatable results in busy machine shops, production lines, and inspection labs. Its compact plug form makes it easy to carry between