HK Series Industrial Interchange Series B Brass Hydraulic Quick Disconnect, Male Half, -04 Coupling, 1/4-18 Female NPT

Brass construction paired with stainless steel springs gives this coupling solid corrosion resistance across a wide range of fluids and environments. For straight hydraulic and general fluid transfer work in ag settings, it holds up well. If you're running it in contact with more aggressive chemicals regularly, the seal material is worth paying attention to. Standard seals are Buna-N, but you can spec it with Neoprene, FKM, EPDM, or Kalrez if the fluid compatibility requires something different.