ISO plug gauges in hardened steel Ø 0.40 to Ø 19.999 mm Micron progression (0.001 mm) – Hardened steel The ISO plug gauges are designed for precise inspection of bores according to ISO standards, ensuring reliable verification of dimensional tolerances in both production and laboratory environments. Made from hardened steel, they provide excellent wear resistance, high dimensional stability and long service life, even under intensive use. The clear marking of ISO tolerances allows quick and secure identification. Key features Micron progression (0.001 mm) for ultra-precise inspection Range from Ø 0.40 to Ø 19.999 mm ISO tolerance marking (GO / NO GO) Manufactured in hardened steel for high wear resistance Double-ended design for fast and reliable inspection Variable usable length depending on diameter Usable length Diameter range Usable length Ø 0.40 to Ø 0.499 mm 3.5 mm Ø 0.50 to Ø 0.699 mm 4.5 mm Ø 0.70 to Ø 0.999 mm 5 mm Ø 1.000 to Ø 1.999 mm 5 mm Ø 2.000 to Ø 3.999 mm 6 mm Ø 4.000 to Ø 5.999 mm 10 mm Ø 6.000 to Ø 9.999 mm 10 mm Ø 10.000 to Ø 19.999 mm 14 mm Accuracy Diameter range Tolerance Ø 0.40 to Ø 3.999 mm ±0.0004 mm Ø 4.000 to Ø 5.999 mm ±0.0005 mm Ø 6.000 to Ø 19.999 mm ±0.001 mm Application Ideal for bore inspection, ISO plug gauges enable fast, reliable and repeatable verification of tolerances in industrial and metrology environments.