ISO 8434-1:2018
Metallic tube connections for fluid power and general use - Part 1: 24° cone connectors

Standard No.

ISO 8434-1:2018

Release Date

2018

Published By

International Organization for Standardization (ISO)

Latest

ISO 8434-1:2018

Scope

This document specifies the general and dimensional requirements for 24° cone connectors using cutting ring and O-ring seal cone (referred to as DKO) suitable for use with ferrous and non-ferrous tubes with outside diameters from 4 mm to 42 mm inclusive. These connectors are for use in fluid power and general applications within the limits of pressure and temperature specified in this document. They are intended for the connection of plain end tubes and hose fittings to ports in accordance with These connectors provide full-flow connections in hydraulic systems operating to the working pressures shown in Table 1. Because many factors influence the pressure at which a system performs satisfactorily, these values are not intended to be understood as guaranteed minimums. For every application, sufficient testing is meant to be conducted and reviewed by both the user and manufacturer to ensure that required performance levels are met. NOTE 1 For new designs in hydraulic fluid power applications, see the requirements given in 9.6. Where the requirements of the application allow for the use of elastomeric seals, connector designs that conform to International Standards and incorporate elastomeric sealing are preferred. NOTE 2 For use under conditions outside the pressure and/or temperature limits specified, see 5.4. This document also specifies a performance and qualification test for these connectors.

ISO 8434-1:2018 Referenced Document

• ISO 1127:1992 Stainless steel tubes; dimensions, tolerances and conventional masses per unit length
• ISO 1179-1:2013 Connections for general use and fluid power.Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing.Part 1: Threaded ports
• ISO 1179-2:2013 Connections for general use and fluid power.Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing - Part 2: Heavy-duty (S series) and light-duty (L series) stud ends with elastomeric sealing (type E)
• ISO 1179-4:2007 Connections for general use and fluid power - Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing - Part 4: Stud ends for general use only with metal-to-metal sealing (type B)
• ISO 19879:2010 Metallic tube connections for fluid power and general use - Test methods for hydraulic fluid power connections
• ISO 228-1:2000 Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions, tolerances and designation
• ISO 3304:1985 Plain end seamless precision steel tubes; Technical conditions for delivery
• ISO 3305:1985 Plain end welded precision steel tubes; Technical conditions for delivery
• ISO 3601-3:2005 Fluid power systems - O-rings - Part 3: Quality acceptance criteria
• ISO 4759-1:2000 Tolerances for fasteners - Part 1: Bolts, screws, studs and nuts - Product grades A, B and C
• ISO 48:2010 Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 10 IRHD and 100 IRHD)
• ISO 5598:2008 Fluid power systems and components - Vocabulary
• ISO 6149-1:2006 Connections for hydraulic fluid power and general use - Ports and stud ends with ISO 261 metric threads and O-ring sealing - Part 1: Ports with truncated housing for O-ring seal
• ISO 6149-2:2006 Connections for hydraulic fluid power and general use - Ports and stud ends with ISO 261 metric threads and O-ring sealing - Part 2: Dimensions, design, test methods and requirements for heavy-duty (S series) stud ends
• ISO 6149-3:2006 Connections for hydraulic fluid power and general use - Ports and stud ends with ISO 261 metric threads and O-ring sealing - Part 3: Dimensions, design, test methods and requirements for light-duty (L series) stud ends
• ISO 724:1993 ISO general-purpose metric screw threads; basic dimensions
• ISO 9227:2017 Corrosion tests in artificial atmospheres - Salt spray tests
• ISO 965-1:2013 ISO general purpose metric screw threads.Tolerances.Part 1: Principles and basic data
• ISO 9974-1:1996 Connections for general use and fluid power - Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing - Part 1: Threaded ports
• ISO 9974-2:1996 Connections for general use and fluid power - Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing - Part 2: Stud ends with elastomeric sealing (type E)
• ISO 9974-3:1996 Connections for general use and fluid power - Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing - Part 3: Stud ends with metal-to-metal sealing (type B)

ISO 8434-1:2018 history

• 2018 ISO 8434-1:2018 Metallic tube connections for fluid power and general use - Part 1: 24° cone connectors
• 2007 ISO 8434-1:2007 Metallic tube connections for fluid power and general use - Part 1: 24° cone connectors
• 1994 ISO 8434-1:1994 Metallic tube connections for fluid power and general use - Part 1: 24° compression fittings