JBO Thread Ring Gauge (GO) - Metric Coarse - Left Hand - 6g - M4 x 0.7 M&D 1/4" delivers a precise

1/4" delivers a precise

ISO H5 tolerance with M2 HSS: Delivers precise size control and durable performance at 27

56 mm with a left-hand spiral flute

Built for Demanding Applications: Engineered for high-precision work

Flute direction: Left-hand spiral flute tuned for efficient chip evacuation during reaming

JBO Thread Ring Gauge (GO) - Metric Coarse - Left Hand - 6g - M4 x 0.7 M&D 1/4" delivers a preciseThe JBO Thread Ring Gauge (GO) Metric Coarse Left Hand 6g M4 x 0. 7 is a precision Go gauge built to verify external threads on metric coarse fasteners and components. It helps engineers, machinists, quality inspectors, and maintenance technicians quickly confirm whether a parts threads will engage properly with mating pieces, supporting accurate assembly and reliable performance. Manufactured from hardened steel, this gauge delivers rugged durability