ISO 1:2016 Geometrical product specifications (GPS) — Standard reference temperature for the specification of geometrical and dimensional properties
ISO 1 is an international standard set by the International Organization for Standardization that specifies the standard reference temperature for geometrical product specification and verification. The temperature is fixed at 20 degrees Celsius (°C), which exactly equals both 293.15 kelvin (K) and 68 degrees Fahrenheit (°F). Due to thermal expansion, precision length measurements need to be made at […]