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

Application: Finishing and precise reaming to achieve accurate bore size and smooth bore surface

Wide diameter range with tight tolerance: Delivers precise

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