Is the Quick-connection socket DN5.5 with valve, threaded, hardened steel, 1400KA series compatible with standard ISO 6150B couplers and fittings?

Quick-connection socket DN5.5 with valve, threaded, hardened steel, 1400KA series is compatible with standard ISO 6150B couplers and fittings. The product description explicitly states compliance with the ISO 6150B standard (A-A-59439, MIL C-4109), and it is offered with BSPT external or BSP internal threads to match common piping connections. Materials and valve design (ULTRA-FLOW) follow the standardâs requirements for interchangeability, so it will mate correctly with other ISO 6150B couplers and fittings used for compressed air.

Can the Quick-connection socket DN5.5 with valve, threaded, hardened steel, 1400KA series be used with food-grade lubricants and seals?

Quick-connection socket DN5.5 with valve, threaded, hardened steel, 1400KA series uses NBR seals and QPQ-hardened steel, nickel-plated brass and stainless-steel components. NBR (nitrile) is not generally recommended for prolonged contact with food-grade oils or where direct food contact may occur, and QPQ salt-bath carburizing surfaces/coatings and nickel-plating are not certified food-safe. Therefore this coupling is not suitable for applications requiring food-grade lubricants or food-contact seals unless the manufacturer provides specific food-grade certification or an alternative seal/material option (e.g., FDA/NSF-approved elastomers and food-safe plating). For food-industry use, request certified food-grade versions or compatible materials from the supplier.

Quick-connection socket DN5.5 with valve, threaded, hardened steel, 1400KA series

All products, General-purpose low-pressure quick couplings/

Additional information

Material	CS – steel (cast iron)
Standard length [m]	7.5

Quick coupling socket with valve, DN5.5, compliant with ISO 6150B standard (A-A-59439, MIL C-4109), series 1400KA, with external BSPT thread or internal BSP thread. High-quality socket equipped with ULTRA-FLOW valve, featuring optimal flow characteristics. The socket body is made of hardened steel through the QPQ salt bath carburizing process, enhancing wear and corrosion resistance (black color). Versatile use in the industry, primarily for compressed air. Performance: 940 l/min (Pe = 6 bar, Δp=0.5 bar – air). Working pressure: 35 bar. Material: QPQ hardened steel (socket body), nickel-plated brass (connection part and sleeve), stainless steel (spring, balls, and ring). Sealing: NBR. Operating temperature: from -20°C to +100°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
RE-1400KAAK13SPN	Quick coupling socket 1400 DN5.5, GZ 1/4" BSPT, NBR	-	35	In stock	Enquiry
RE-1400KAAK17SPN	Quick coupling socket 1400 DN5.5, GZ 3/8" BSPT, NBR	-	35	In stock	Enquiry
RE-1400KAAK21SPN	Quick coupling socket 1400 DN5.5, GZ 1/2" BSPT, NBR	-	35	In stock	Enquiry
RE-1400KAIW13SPN	Quick coupling socket 1400 DN5.5, GW 1/4" BSP, NBR	-	35	In stock	Enquiry
RE-1400KAIW17SPN	Quick coupling socket 1400 DN5.5, GW 3/8" BSP, NBR	-	35	In stock	Enquiry
RE-1400KAIW21SPN	Quick coupling socket 1400 DN5.5, G 1/2" BSP, NBR	-	35	In stock	Enquiry

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Quick coupling socket with valve, DN5.5, compliant with ISO 6150B standard (A-A-59439, MIL C-4109), series 1400KA, with external BSPT thread or internal BSP thread. High-quality socket equipped with ULTRA-FLOW valve, featuring optimal flow characteristics. The socket body is made of hardened steel through the QPQ salt bath carburizing process, enhancing wear and corrosion resistance (black color). Versatile use in the industry, primarily for compressed air. Performance: 940 l/min (Pe = 6 bar, Δp=0.5 bar – air). Working pressure: 35 bar. Material: QPQ hardened steel (socket body), nickel-plated brass (connection part and sleeve), stainless steel (spring, balls, and ring). Sealing: NBR. Operating temperature: from -20°C to +100°C.