JBO Thread Ring Gauge (GO) - UNF - Right Hand - 3A - No. 12 x 28 Hex Key Drill Chuck 55 mm is a precision

55 mm is a precision finishing tool designed to enlarge and smooth small-diameter holes with tight

Precise Metric Fine GO Gauge for M55 x 2 (6e): Enables quick pass/fail checks to exact metric fine-thread standards

Precise Metric Fine-Thread Verification (M70 x 2

16 mm bores to tight ISO tolerances

and consistent assembly quality in both small shops and high-volume production environments

JBO Thread Ring Gauge (GO) - UNF - Right Hand - 3A - No. 12 x 28 Hex Key Drill Chuck 55 mm is a precisionThe JBO Thread Ring Gauge (GO) for UNF, Right Hand, 3A, No. 12 x 28 is a precision tool designed to verify external UNF threads quickly and reliably. Its ideal for engineers, inspectors, machinists, and quality teams who need confidence that threaded components meet exact UNF go standards during assembly and QC checks. Crafted from hardened steel, this GO gauge delivers durable performance in demanding workshops and production lines. Its right hand