JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M21 x 1 Tapping Chucks Material: Carbide end mill for

Material: Carbide end mill for hardness

Flute Design: Spiral flute promotes efficient chip evacuation and smooth cutting action

predictable performance with a clean finish

repeatable checks: Clean machining and ergonomic handling support smooth

you can expect consistent hole sizes across parts and batches

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M21 x 1 Tapping Chucks Material: Carbide end mill forThe JBO Thread Ring Gauge (GO) Metric Fine Left Hand 6g M21 x 1 is a precision tool designed to verify external thread diameters on fasteners, fittings, and machined components. It is ideal for engineers, machinists, quality inspectors, and workshop technicians who need fast, reliable go no go checks to ensure threads meet their exact specifications. Crafted from hardened steel with a knurled exterior for secure handling, this GO gauge delivers