JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M31 x 0.5 End Mill Holders The taper shank ensures secure

The taper shank ensures secure mounting and reduced runout

Bore: 3/8" bore to fit common milling arbors

It features a left-hand spiral flute with right-hand cutting and through coolant for stable cutting and efficient chip evacuation in through-holes

Precise diameter tolerance of +0/-0

JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M31 x 0.5 End Mill Holders The taper shank ensures secureThe JBO Thread Ring Gauge (NoGo) Metric Fine Right Hand 6g M31 x 0. 5 is a precision inspection tool for external metric threads. Its NoGo design supports quick pass fail verification, making it ideal for machinists, inspectors, and quality teams that require reliable diameter checks on threaded components. Crafted from hardened steel with a wear resistant finish, this gauge is built to withstand daily use in demanding workshop environments. The