Go Plug Gage 6.88mm Gauge Diameter Gcr15 Bearing Steel 0.001mm Precision

Made of bearing steel with high hardness strong wear resistance and heat treatment processing for durability. 0.001mm precision accurate measurement. Roughness is less than 0.2UM smooth surface without burrs. Used to measure the size or depth of holes check the distance between two holes and can also be used as a go-no-go gauge. Widely used in high-precision technical fields such as electronic boards circuit boards and precision machinery manufacturing. An essential tool for the standardization of detection holes. To keep the measurement accuracy please do not scratch the surface and do anti-rust treatment after use.