JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M40 x 1 FLH This reamer is designed to

This reamer is designed to deliver tight hole tolerances and a clean bore

With ISO H5 tolerance and M2 high-speed steel construction

maintaining accuracy and extending tool life for long-term reliability

so you can focus on cutting quality and part accuracy

This reamer uses a taper shank for secure mounting

JBO Thread Ring Gauge (NoGo) - Metric Fine - Left Hand - 6g - M40 x 1 FLH This reamer is designed toThe JBO Thread Ring Gauge NoGo (Metric Fine, Left Hand) is a precision inspection tool designed to verify external thread diameters on components with metric fine threads, including M40 x 1. Its ideal for machinists, inspectors, and maintenance teams who need fast, dependable checks to confirm parts meet exact specifications. Crafted from hardened steel for maximum durability, this NoGo gauge resists wear in demanding workshop environments, delivering