High Flow Hydraulic Quick Couplers | Parker ST Series

Parker ST Series Hydraulic Couplers Key Features

  • The smooth, open bore with no valving in either half offers minimal pressure drop and allows easy cleaning in applications where the same lines are used for more than one media.
  • ST couplers and nipples are machined from solid barstock, providing a quality coupling that is durable. ST couplers are available in brass and 303 stainless steel as standard product materials.
  • ST nipples are available in 303 stainless steel, brass and Chromium-6 Free plated steel. The ball locking grooves of the steel ST nipples are case hardened for resistance to brinelling where high cycle rates and pressure surges are encountered.
  • The ST is an “Interchange” coupling since it dimensionally, and functionally, interchanges with similar couplings made by other manufacturers.

ST Series Product Specifications


ST Series Couplers ST Series Nipples


Parker ST series are non-valved couplings for applications where maximum flow is required. Their smooth, open bore offers the lowest pressure drop of any quick coupling design.

ST series is ideal for applications such as high-pressure water and steam washers, carpet cleaners and mold coolant lines.

More Quick Couplers and Related Products


ST Series Couplers ST Series Nipples Dust Plugs & Caps More Hydraulic QCs  Other Quick Couplers
(Hydraulic & Pneumatic)

Warning Triangle WARNING: These products can expose you to chemicals including lead and/or DEHP and/or carbon black, which are known to the State of California to cause cancer or birth defects or other reproductive harm.  For more information go to www.P65Warnings.ca.gov