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ISO/FDIS 12251

Superseded

Superseded

Diesel engines — Clamp mounted CR fuel injectors — Mounting dimensions

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

09-26-2025

Superseded date

01-26-2026

US$96.00
Excluding Tax where applicable

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:

  1. TypeA, where the nozzle capnut is straight (see Figure4);
  2. TypeB, where the nozzle capnut is stepped (see Figure5).

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.

Committee
ISO/TC 22/SC 34
DocumentType
Draft
Pages
12
PublisherName
International Organization for Standardization
RevisionOf
Status
Superseded
Supersedes

US$96.00
Excluding Tax where applicable