Parker PD Series nipples connect with the PD Series couplers under push-to-connect operation for hydraulic & pneumatic applications in fluid or air system maintenance & troubleshooting, mobile equipment engines, cooling systems and industrial hydraulic systems. These non-spill couplings with flush face valves reduce spillage and entry of air while connecting or disconnecting fluid lines. They have steel construction with zinc & clear trivalent chromate plating and a nitrile seal for corrosion resistance, thereby preventing entry of dust and withstanding a maximum operating pressure of 6000 psi. Selected models have bulkhead end fitting configurations for specific system installations and panel mounting. Choose from a wide range of these male / female threaded nipples with NPTF, UNF, Metric, Triple-Loc or Seal-Loc port end connections.