ISO 13948-1:2015

Diesel engines — Fuel injection pumps and fuel injector low-pressure connections — Part 1: Threaded connections

ISO 13948-1:2015 specifies dimensions and requirements for mechanical, threaded connections used on diesel fuel injection pumps and fuel injectors for the connection of low-pressure fuel, lubrication oil or air supply. Five types of threaded connections (types A to E) are described in this part of ISO 13948. Type A is commonly used for both pumps and injectors, while types B to E are for diesel fuel injection pumps only. NOTE: Low-pressure connections to fuel filters are covered in other International Standards; see the Bibliography. High-pressure end-connections for pumps and injectors are covered in ISO 2974

Moteurs diesels — Raccords basse pression pour pompes d'injection de combustible et porte-injecteurs de combustible complets — Partie 1: Raccords filetés

General Information

• Status: Published
• Publication Date: 13-Aug-2015
• ICS: 43.060.40 - Fuel systems
• Technical Committee: ISO/TC 22/SC 34 - Propulsion, powertrain and powertrain fluids
• Drafting Committee: ISO/TC 22/SC 34 - Propulsion, powertrain and powertrain fluids
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 01-Mar-2021

Relations

• Revises: ISO 13948-1:2000 - Diesel engines — Fuel injection pumps and fuel injector low-pressure connections — Part 1: Threaded connections
• Effective Date: 25-May-2013

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 13948-1
Second edition
2015-08-15
Diesel engines — Fuel injection
pumps and fuel injector low-pressure
connections —
Part 1:
Threaded connections
Moteurs diesels — Raccords basse pression pour pompes d’injection
de combustible et porte-injecteurs de combustible complets —
Partie 1: Raccords filetés
Reference number
ISO 13948-1:2015(E)
©
ISO 2015

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ISO 13948-1:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ii © ISO 2015 – All rights reserved

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ISO 13948-1:2015(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 1
3.1 Terms and definitions . 1
3.2 Symbols . 2
4 Connection designs and applications . 2
4.1 General . 2
4.2 Types of connection . 2
4.2.1 Type A: banjo connection (see Figure 1) . 2
4.2.2 Type B: O-ring seal connection (see Figure 2) . 2
4.2.3 Type C: compression seal connection (see Figure 3) . 2
4.2.4 Type D: internal rubber ring seal “flexible” connection (see Figure 4) . 3
4.2.5 Type E: external rubber ring seal “flexible” connection (see Figure 5) . 3
5 Dimensions and tolerances . 3
6 Designation . 3
Bibliography . 9
© ISO 2015 – All rights reserved iii

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ISO 13948-1:2015(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 34,
Propulsion, powertrain, and powertrain fluids.
This second edition cancels and replaces the first edition (ISO 13948-1:2000), which has been
technically revised. The following changes have been made: the tables and figures have been revised.
ISO 13948 consists of the following parts, under the general title Diesel engines — Fuel injection pumps
and fuel injector low-pressure connections:
— Part 1: Threaded connections
— Part 2: Non-threaded (push-on) connections
iv © ISO 2015 – All rights reserved

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ISO 13948-1:2015(E)

Introduction
It is recognized that a large variety of low-pressure connections for fuel injection pumps and injectors
exist, using different sealing principles as well as designs. ISO 13948 attempts to provide the user with
a common set of preferred types.
ISO 13948 is divided into two parts, covering threaded connections (ISO 13948-1) and non-threaded
(push-on) connections (ISO 13948-2) for use with low-pressure fuel supply and return, boost air
pressure and lubricating oil supply and return.
© ISO 2015 – All rights reserved v

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INTERNATIONAL STANDARD ISO 13948-1:2015(E)
Diesel engines — Fuel injection pumps and fuel injector
low-pressure connections —
Part 1:
Threaded connections
1 Scope
This part of ISO 13948 specifies dimensions and requirements for mechanical, threaded connections
used on diesel fuel injection pumps and fuel injectors for the connection of low-pressure fuel, lubrication
oil or air supply.
Five types of threaded connections (types A to E) are described in this part of ISO 13948. Type A is
commonly used for both pumps and injectors, while types B to E are for diesel fuel injection pumps only.
NOTE Low-pressure connections to fuel filters are covered in other International Standards; see the
Bibliography. High-pressure end-connections for pumps and injectors are covered in ISO 2974
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 261, ISO general purpose metric screw threads — General plan
ISO 4288, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Rules and
procedures for the assessment of surface texture
ISO 6149-1, Connections for hydraulic fluid power and general use — Ports and stud ends with ISO 261
...