JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M28 x 2 ER Collet Chucks accurate hole finishing with a

accurate hole finishing with a left-hand spiral flute and right-hand cutting

minimizing vibration and delivering consistent surface finish

000 RPM with a balanced G6

The AcuRea coating improves wear resistance and heat management

Crafted in high-speed steel (M2) with a straight shank and spiral flute

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M28 x 2 ER Collet Chucks accurate hole finishing with aThe JBO Thread Plug Gauge is a purpose built tool for precise thread inspection in metric fine thread applications. Designed for right hand M28 x 2 holes and rated with a 4H tolerance, this Go No Go gauge provides quick, repeatable checks to confirm whether a hole meets spec before assembly. Its compact, durable design is suited for machine shops, maintenance teams, and quality control workflows. The gauge combines a hardened steel core with a