JBO Thread Ring Gauge (NoGo) - UNC - Left Hand - 2A - 1/4 x 20 ER Collet Chucks reliable square-edge accuracy

reliable square-edge accuracy

this reamer supports consistent dimensional control in precision machining and toolmaking

The long neck design provides the reach needed for deep grooves and intricate cavities without sacrificing rigidity

making it the right choice for applications that require sharp

Secure taper shank with BS 328/4 compliance: Provides firm seating in compatible machines

JBO Thread Ring Gauge (NoGo) - UNC - Left Hand - 2A - 1/4 x 20 ER Collet Chucks reliable square-edge accuracyThe JBO Thread Ring Gauge (NoGo) for UNC external threads is a precision inspection tool designed for manufacturers, machinists, QA teams, and assembly specialists. Sized for 1 4 x 20 with a left hand thread and a class 2A tolerance, this gauge helps confirm that threaded components meet Unified thread standards at a glance. With a robust hardened steel construction and a dedicated NoGo feature, this gauge makes it easy to spot non conforming threads