Left-hand spiral flute with right-hand cutting: This configuration delivers stable cutting and controlled chip flow for clean finishes and predictable reaming performance
it is specified to ISO H5 tolerance (-0 to +0
with through coolant to help flush chips and keep the edge stable during reaming
DIN 212‑B compatibility and ISO H5 tolerance: Provides precise dimensions and reliable interchange with standard tooling for predictable results
speeding up workflows and improving overall machining quality
JBO Thread Ring Gauge (NoGo) - Metric Coarse - Right Hand - 4h - M1.8 x 0.35 M&D Left-hand spiral flute with right-handThe JBO Thread Ring Gauge (NoGo) Metric Coarse, Right Hand, 4h, M1. 8 x 0. 35 is a precise reference tool for validating external thread diameters. Designed for quality control teams, machinists, engineers, and workshop technicians, it helps quickly confirm whether a components coarse metric threads conform to the specified limits without guesswork. Crafted from hardened steel for long wear resistance, this gauge withstands daily use in busy