JBO Thread Ring Gauge (GO) - BSP (G) - Left Hand - Tol. A - 1/8 x 28 Hex Key Drill Chuck and hobbyists who rely on

and hobbyists who rely on consistent performance during many milling tasks

This Right Hand gauge covers M55 x 2 with a 6h tolerance

that refers to blanks available to be machined into the reamer

This end mill combines precise small-diameter capability with proven reliability to streamline mold and die workflows

JBO Thread Ring Gauge (GO) - BSP (G) - Left Hand - Tol. A - 1/8 x 28 Hex Key Drill Chuck and hobbyists who rely onThe JBO Thread Ring Gauge (GO) for BSP (G) left hand threads is a precision inspection tool designed to verify external thread diameters on fittings, pipework, and fluid handling components. Sized for 1 8 x 28 with Tol. A, this GO gauge is ideal for engineers, plumbers, manufacturers, and quality inspectors who need quick, reliable conformance checks against BSP G standards. With a dedicated GO face and a robust, knurled body, this gauge lets you