This part of ISO 7440 specifies two types of calibrat- ing nozzle and holder assemblies intended for the testing and setting of diese1 fuel injection Pumps on test benches. lt applies to a) a calibrating nozzle and holder assembly with a Single hole orifice plate; b) a calibrating nozzle and holder assembly with a delay pintle type nozzle. The approximate range of the calibrating nozzle and holder assembly is up to - 300. mm3/stroke with the Single hole orifice plate - 150 mm3/stroke with the delay pintle type nozzle.