JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - No. 6 x 40 Power Milling Chucks 3mm x 20mm – is

3mm x 20mm – is a high-performance milling tool designed to cut very hard materials with precision

clean cuts: coolant is delivered through the tool to the cutting edge

Coating: AcuRea multi-layer nano chrome applied to the flute and land surfaces for reduced friction and extended edge life

This hand reamer enables precise enlargement of drilled holes to the exact size with a smooth finish

and shops needing accurate

JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - No. 6 x 40 Power Milling Chucks 3mm x 20mm – isThe JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external UNF threads. Sized for Left Hand, 2A class, No. 6 x 40, it enables quick, confident checks in manufacturing, automotive, and aerospace environments. The No Go design helps you identify non conforming threads at a glance, supporting accurate assembly and reliable performance. Manufactured from hardened steel, this gauge delivers durability in busy inspection rooms. Its