Connectors and Couplings ISO Standards – U.S. Technical Advisory Group Convenes

Standards Development

Savannah, Georgia was the site of the spring 2018 U.S. Technical Advisory (TAG) to Subcommittee 4 – Connectors and Couplings meeting.  Over 30 committee members came together to continue the U.S. ISO standards development work on all things fluid power connectors-related. The subcommittee is currently working on 28 standards at various stages of development.

The meeting kicked off with the nomination of six delegates to attend the fall TC 131/SC 4 meetings in Frankfurt, Germany. In October, representatives from the U.S. TAG will meet with worldwide engineering counterparts to further the development of connectors-related standards.  Several proposals are expected during the October meeting, including a new work item proposal by the U.K. experts to standardize hose length tolerances in ISO 17165‑1:2007 (Hydraulic fluid power — Hose assemblies — Part 1: Dimensions and requirements).

Ballot results also came in over the past several months for several standards, including two projects currently awaiting publication:

  • ISO/FDIS 6162-2 [Hydraulic fluid power — Flange connections with split or one-piece flange clamps and metric or inch screws — Part 2: Flange connectors, ports and mounting surfaces for use at a pressure of 42 MPa (420 bar), DN 13 to DN 76]
  • ISO/FDIS 8434‑1 (Metallic tube connections for fluid power and general use — Part 1: 24° cone connectors)

If you would like to get involved in the U.S. ISO standards development process, please contact Denise Husenica at