Geometrical product specifications (GPS) – Working gauges for external dimensions with tolerance class according to DIN EN ISO 286-1 and DIN EN ISO 286-2 and nominal dimensions of 1 mm to 500 mm and associated acceptance gauges – Gauge dimensions and tolerances
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2017

Workshop Gap Gauges and Check Gauges for ISO Fit Sizes from 1 to 500 mm Nominal Dimension; Gauge Dimensions and Manufacturing Tolerances
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 08/01/1966