ISO/TC 131/SC 4/WG 1 - Ports and connector stud ends

This document specifies dimensions for metric ports for use with the adjustable and non-adjustable stud ends as described in ISO 6149‑2 and ISO 6149‑3. Ports in accordance with this document can be used at working pressures up to 63 MPa [630 bar[1]] for non-adjustable stud ends and 40 MPa (400 bar) for adjustable stud ends. The permissible working pressure depends upon port size, materials, design, working conditions, application, etc. See ISO 6149‑2 and ISO 6149‑3 for pressure ratings. NOTE The Introduction of this document gives recommendations for ports and stud ends to be used for new designs in hydraulic fluid power applications. [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.

ISO/TS 11686:2017 provides common installation instructions for all connectors that have adjustable stud ends and O-ring sealing. Conformance with the requirements of this document will result in a considerable reduction of leaks in hydraulic systems.

ISO 1179-1:2013 specifies dimensions for ports with ISO 228‑1 threads for use with non-adjustable stud ends described in ISO 1179‑2, ISO 1179‑3 and ISO 1179‑4 and with adjustable stud ends described in ISO 1179‑3. Ports in accordance with ISO 1179-1:2013 are applicable for use with ISO 1179‑2 heavy-duty (S series) stud ends with type E sealing at working pressures up to 63 MPa (630 bar) and light-duty (L series) stud ends at working pressures up to 25 MPa (250 bar), ISO 1179‑3 light-duty (L series) stud ends with type G sealing at working pressures up to 31,5 MPa (315 bar), and with ISO 1179‑3 light-duty (L series) adjustable stud ends with type H sealing at working pressures up to 20 MPa (200 bar), and ISO 1179‑4 stud ends with type B sealing at working pressures up to 40 MPa (400 bar) for the S series, up to 25 MPa (250 bar) for the L series, and up to 10 MPa (100 bar) for the LL series, except for the G2 size port, which in hydraulic fluid power systems is used mainly with accumulators and for which ISO 1179‑3 and ISO 1179‑4 do not specify stud ends. The permissible working pressure depends upon size, materials, design, working conditions, application, etc.

ISO 1179-2:2013 specifies dimensions, performance requirements and test procedures for heavy-duty (S series) and light-duty (L series) stud ends with ISO 228‑1 threads and the elastomeric sealing (type E) that is used with them. Heavy-duty (S series) stud ends with type E sealing in accordance with ISO 1179-2:2013 can be used at working pressures up to 63 MPa (630 bar). Light-duty (L series) stud ends with type E sealing in accordance with ISO 1179-2:2013 can be used at working pressures up to 25 MPa (250 bar). The permissible working pressure depends upon size, materials, design, working conditions, application, etc.

ISO 1179-4:2007 specifies dimensions, performance requirements and test procedures for stud ends with ISO 228-1 threads and metal-to-metal sealing for general use only. These stud ends should not be used for leak-free hydraulic fluid power applications.

ISO 1179-3:2007 specifies dimensions, performance requirements and test procedures for non-adjustable and adjustable light-duty (L series) stud ends with ISO 228-1 threads with sealing by O-ring with retaining ring (types G and H, respectively).

ISO 6149-2:2006 specifies dimensions, performance requirements and test procedures for metric adjustable and non-adjustable heavy-duty (S series) stud ends and O-rings. Stud ends in accordance with ISO 6149-2:2006 may be used at working pressures up to 63 MPa (630 bar) for non-adjustable stud ends and 40 MPa (400 bar) for adjustable stud ends. The permissible working pressure depends upon the stud end size, materials, design, working conditions, application, etc.

ISO 6149-3:2006 specifies dimensions, performance requirements and test procedures for metric adjustable and non-adjustable light-duty (L series) stud ends and O-rings. Stud ends in accordance with ISO 6149-3:2006 may be used at working pressures up to 40 MPa (400 bar) for non-adjustable stud ends and 31,5 MPa (315 bar) for adjustable stud ends. The permissible working pressure depends upon the stud end size, materials, design, working conditions, application, etc.

Specifies dimensions, performance requirements and test procedures for heavy-duty (S series) and light-duty (L series) stud ends with ISO 261 threads and the elastomeric sealing that is used with them. It also specifies the designation of these stud ends and their elastomeric sealing.

Specifies dimensions for ports with ISO 261 threads and elastomeric (type E) or metal-to-metal (type B) sealing for general use and in fluid power applications with the stud ends detailed in ISO 9974-2 and ISO 9974-3. It also specifies test methods and the designation of these ports.

Specifies dimensions, performance requirements and test procedures for heavy-duty (S series), light-duty (L series) and extra-light-duty (LL series) stud ends with ISO 261 threads and metal-to-metal sealing. It also specifies the designation of these stud ends.

Specifies dimensions, performance requirements and test procedures for adjustable and non-adjustable heavy-duty (S series) stud ends and for their related O-rings, for general use and fluid power applications. Also specifies the designation of these stud ends.

Specifies dimensions, performance requirements and test procedures for adjustable and non-adjustable light-duty (L series) stud ends and for their related O-rings, for general use and fluid power applications. Also specifies the designation of these stud ends.

Specifies dimensions for ports with inch threads for use with the adjustable and non-adjustable stud ends. Also specifies test methods and the designation of these ports.

ISO 1179-1:2007 specifies dimensions for ports with ISO 228-1 threads for use with non-adjustable stud ends shown in ISO 1179-2, ISO 1179-3 and ISO 1179-4 and with adjustable stud ends shown in ISO 1179-3.

ISO 1179-2:2007 specifies dimensions, performance requirements and test procedures for heavy-duty (S series) and light-duty (L series) stud ends with ISO 228-1 threads and the elastomeric sealing (type E) that is used with them.

ISO 6149-1:2006 specifies dimensions for metric ports for use with the adjustable and non-adjustable stud ends detailed in ISO 6149-2:2006 and ISO 6149-3:2006. Ports in accordance with ISO 6149-1:2006 may be used at working pressures up to 63 MPa (630 bar) for non-adjustable stud ends and 40 MPa (400 bar) for adjustable stud ends. The permissible working pressure depends upon port size, materials, design, working conditions, application, etc. See ISO 6149-2:2006 and ISO 6149-3:2006 for pressure ratings.

Stud ends in accordance with this part may be used at working pressures up to 40 MPa (400 bar) for non-adjustable stud ends, and 31,5 MPa (315 bar) for adjustable stud ends. The permissible working pressure depends upon the stud end size, materials, design, working conditions, application, etc. For threaded ports and stud ends specified in new designs in hydraulic power applications, only ISO 6149 is to be used rather than ISO 1179 and ISO 11926.

Stud ends in accordance with this part may be used at working pressures up to 63 MPa (630 bar) for non-adjustable stud ends, and 40 MPa (40 bar) for adjustable stud ends. The permissible working pressure depends upon the stud end size, materials, design, working conditions, application, etc. For threaded ports and stud ends specified in new designs in hydraulic power applications, only ISO 6149 rather than ISO 1179 and ISO 11926 is to be used.

Specifies dimensions for metric ports for use with the adjustable and non-adjustable stud ends detailed in ISO 6149-2 and ISO 6149-3. Ports in accordance with this part may be used at working pressures up to 63 MPa for non-adjustable stud ends, and 40 MPa for adjustable ones. The permissible working pressure depends upon the stud end size, materials, design, working conditions, application, etc. For threaded ports and stud ends specified in new designs in hydraulic power applications, only ISO 6149 rather than ISO 1179 and ISO 11926 is to be used.