AG Series

Poppet seal or ball valve couplers made to the ISO 5675 Standard 

AKJia’s AG Series couplers are designed with a poppet valve or ball valve (old version) for quick connection and disconnection. They are interchangeable with the ISO A couplers in 1/2″ size only, and Other sizes comply with ISO7241 Series A. 


  • Carbon steel with trivalent plating
  • Zinc Nickel Plating is an option
  • Fitted with Nitrile seals (NBR), FKM option
Datasheet Inquiry
AG Series ISO 5675 Agricultural Quick Coupling


  • Made to ISO 5675 Standard in 1/2” size only
  • 1/2” male has an internal diverter to prevent reverse flow checking
  • Optional zinc nickel plating provides corrosion resistance (500 hours with no red rust in salt spray tests)
  • Poppet valves have balanced springs
  • The locking ball system allows quick connection
  • Bidirectional flow


  • Agricultural
  • Mobile
  • Construction


ISO 5675 Quick Couplings are a globally recognized standard for quick couplings designed specifically for agricultural and forestry machinery. They offer a robust, reliable, and user-friendly way to connect and disconnect hydraulic lines quickly and efficiently, even under challenging conditions.

ISO 7241:2023

Available Seals and Temperature Range

All carbon steel products have Nitrile Butadiene Rubber (NBR) seals fitted as standard. All stainless steel products have Fluoro-elastomer Rubber (Viton®) (FKM) seals fitted as standard. Special seal materials are available on request.

Abbreviation Trade Name Chemical Name Min. Temp Max. Temp
NBR, XNBR Chemigum®,  Hycar8,  Breon®,  Butakon®, Butacril®, Buna-N®, Perbunan®, Paracril®, Krynac®, Europrene-N®, Nipol® Nitrile Butadiene Rubber
Carboxylated Nitrile Rubber
-40ºC (-40ºF) 106ºC (223ºF)
FKM(FPM) Dai-el®, Fluorel®, Tecnoflon®, Viton® Fluoro-elastomer Rubber -20ºC (-4ºF) 200ºC (392ºF)
EPR, EPDM Buna-AP®, Dufral®, Epsyn®, Nordel®, Epcar8, Keltan®, Royalene®, Polysar-EPDM® Ethylene Propylene Copolymer
Ethylene Propylene Terpolymer
-50ºC (-58ºF) 120ºC (248ºF)
FVMQ Silastic 1S®, FSE® Fluorosilicone Rubber -65ºC (-85ºF) 170ºC (338ºF)
FFKM Perlast®, Kalrez®, Chemraz®, Kaflon® Perfluoroelastomer -25ºC (-13ºF) 300ºC (572ºF)