JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6h - M3 x 0.25 Power Milling Chucks it follows BS 328/4 taper

it follows BS 328/4 taper standards and carries an ISO H5 tolerance to ensure precise results in standard-length tooling

and quick-change holders—making it a reliable choice for precision finishing tasks

and smooth surface finishes in fine-detail work

With carbide construction built for durability and a range of specifications

this reamer is produced to order with dispatch typically within 24–48 hours after order

JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6h - M3 x 0.25 Power Milling Chucks it follows BS 328/4 taperThe JBO Thread Ring Gauge (NoGo) is a precise inspection tool designed to verify external metric threads. Built for engineers, machinists, quality inspectors, and workshop staff, it provides a clear, fast pass fail indication to ensure components meet exact thread size requirements without guesswork. Made from hardened steel for durability, this metric fine NoGo gauge is designed for right hand threads in the 6H class and M3 x 0. 25 pitch. The knurled