ISO 12251:2017 PDF

Scope: This document specifies dimensional requirements for clamp mounted CR fuel injectors and their corresponding cylinder head features in diesel engines. According to the injector nozzle capnut, the clamp mounted CR fuel injectors can be divided into two types: a) Type A, where the nozzle capnut is straight (see Figure 4); b) Type B, where the nozzle capnut is stepped (see Figure 5). Each clamp mounted CR fuel injector type is subdivided by a series of different sizes. NOTE This differentiation corresponds to the relationship between the two guide diameters of the clamp mounted CR fuel injectors.

ISO 12251:2017 Referenced Document

ISO 1302:2002 Geometrical Product Specifications (GPS) - Indication of surface texture in technical product documentation
ISO 13296:2016 Diesel engines - High-pressure fuel injection pipe assemblies - General requirements and dimensions
ISO 2974:2016 Diesel engines - 60° female cones for high-pressure fuel injection components

2017 ISO 12251:2017 Diesel engines - Clamp mounted CR fuel injectors - Mounting dimensions
2011 ISO 12251:2011 Diesel engines.Clamp mounted CR fuel injectors.Mounting dimensions