JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6h - M18 x 1 Face Mill Arbors - Through Coolant round hole with tight H4

round hole with tight H4 tolerance

The Magafor Reamer is designed for intermediate precision hole finishing

reducing inspection time and eliminating guesswork to keep your production line moving

Leak‑resistant slot geometry: Longitudinal slots do not overlap at the centre to prevent coolant loss

it features a left-hand spiral flute with right-hand cutting and through coolant to improve chip evacuation and cooling

JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6h - M18 x 1 Face Mill Arbors - Through Coolant round hole with tight H4The JBO Thread Ring Gauge (NoGo) Metric Fine, Right Hand, 6h, M18 x 1 is a precision inspection tool designed to verify the maximum permissible size of external threads on fasteners and precision components. Its ideal for quality control teams, machinists, and engineers who need quick, reliable checks to confirm parts meet exacting specifications. Built to endure busy workshop environments, this hardened steel ring gauge delivers consistent results