JBO Thread Ring Gauge (NoGo) - Metric Coarse - Left Hand - 6g - M42 x 4.5 NCDC Drill Chuck Standards‑compliant accuracy and easy mounting:

Standards‑compliant accuracy and easy mounting: DIN 8089 with ISO H4 tolerance and a straight shank ensure precise dimensions and straightforward mounting in common tool holders

26 mm length of cut

it supports consistent results across batches

purpose-built tool for your project

repeatable mounting in compatible chucks or collets

JBO Thread Ring Gauge (NoGo) - Metric Coarse - Left Hand - 6g - M42 x 4.5 NCDC Drill Chuck Standards‑compliant accuracy and easy mounting:The JBO Thread Ring Gauge (NoGo) Metric Coarse, Left Hand, 6g, M42 x 4. 5 is a precision inspection tool designed to verify external thread diameters on fasteners, fittings, and machined components. Its NoGo profile provides a straightforward pass fail check to confirm threads meet the intended size and tolerance. Designed for professionals across quality control labs, machine shops, and assembly lines, this gauge helps ensure metric coarse threads