Kuriyama Hydraulic Connections Quick Release Couplings catalog features the Argus line of products from Alfagomma®. Argus couplings are made from high strength carbon steel with TOP COAT chrome-III zinc plating that provides superior resistance to oxidation. Available parts with sizes from 1/4" to 1 1/2" conform to ISO-A and ISO 7241-1 B standards. Flat Faced couplings, sizes from 1/4" to 1", prevent contamination in construction equipment. Screw-type quick couplings are also available which provide connections with poppet or flat face valves.