This SAE Standard specifies the dimensional requirements necessary for the mounting and interchangeability of four types of fuel injectors in diesel engines. Two of the types specified are flats-located injectors. The location and dimensions of the fuel inlet, leak-off connections, and type of attachment are not defined since they may vary according to the particular application. Field of Application This document is applicable to nozzle holder types 8 and 10 of an unspecified means of angular location and flats-located types 9 and 11 with a 17.0 mm (nominal) shank diameter. The internal construction of the fuel injector remains optional with the manufacturer.