Is the Brass DN5 Quick Connector, Hose End, No Valve, Series 21KA compatible with standard thermoplastic hose sizes and fittings?

Yes — the Brass DN5 Quick Connector, Hose End, No Valve, Series 21KA is compatible with standard thermoplastic hose sizes and fittings. The product description states it is available in a nut end version specifically for thermoplastic hoses, and the corrugated hose end option accommodates conventional hose attachment methods. Its design (DN5/minI size), brass construction, and typical working parameters (up to 35 bar, −20°C to +100°C) make it suitable for standard thermoplastic hose assemblies used in industrial applications. Ensure you match the connector’s DN5 (mini) dimensions and the hose’s nominal size and material to guarantee a proper seal and mechanical fit.

Can the Brass DN5 Quick Connector, Hose End, No Valve, Series 21KA be used with corrugated hoses and thermoplastic hose fittings interchangeably without adapters?

The Brass DN5 Quick Connector, Hose End, No Valve, Series 21KA is offered in two distinct hose-interface versions: one with a corrugated (barbed) hose end and one with a nut end for thermoplastic hoses. These are separate configurations intended to match the corresponding hose type. Therefore they are not interchangeable on the same fitting without using an adapter or changing to the correctly configured plug. Use the corrugated‑end version for flexible corrugated hoses and the nut‑end version for thermoplastic hose fittings to ensure a secure, leak‑free connection.

Brass DN5 Quick Connector, Hose End, No Valve, Series 21KA

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

Additional information

Material	B – brass (bronze)

The quick coupling plug Eurostandard DN5 (MINI), series 21KA, is a compact and highly efficient solution designed for demanding industrial applications where space-saving dimensions must go hand in hand with maximum performance. Manufactured from durable brass, it ensures long-lasting reliability even under intensive use. With a working pressure of up to 35 bar and an operating temperature range from -20°C to +100°C, it guarantees safe and stable operation in diverse environments. The plug is available in two practical versions: with a corrugated hose end or with a nut end for thermoplastic hoses, providing flexibility for different installation needs. Its free-flow design minimizes pressure drop while delivering excellent flow efficiency, making it an ideal choice for systems that require both precision and durability. Thanks to its robust construction and versatile configuration, the 21KA series plug is widely adopted across industries seeking compact, high-performance coupling solutions.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
RE-21SFKO06MXX	Quick coupling plug 21SF DN5, for hose 4x6 mm, brass	4	35	In stock	Enquiry
RE-21SFKO08MXX	Quick coupling plug 21SF DN5, for hose made of 6x8 mm, brass	6	35	In stock	Enquiry
RE-21SFTF04MXX	Quick coupling plug 21SF DN5, for 4 mm hose, brass	4	35	In stock	Enquiry
RE-21SFTF05MXX	Quick coupling plug 21SF DN5, for 5 mm hose, brass	5	35	In stock	Enquiry
RE-21SFTF06MXX	Quick coupling plug 21SF DN5, for 6 mm hose, brass	6	35	In stock	Enquiry
RE-21SFTF08MXX	Quick coupling plug 21SF DN5, for 8 mm hose, brass	8	35	In stock	Enquiry
RE-21SFTF09MXX	Quick coupling plug 21SF DN5, for hose 9 mm, brass	10	35	In stock	Enquiry
RE-21SFTF10MXX	Quick coupling plug 21SF DN5, for hose 10 mm, brass	10	35	In stock	Enquiry

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The quick coupling plug Eurostandard DN5 (MINI), series 21KA, is a compact and highly efficient solution designed for demanding industrial applications where space-saving dimensions must go hand in hand with maximum performance. Manufactured from durable brass, it ensures long-lasting reliability even under intensive use. With a working pressure of up to 35 bar and an operating temperature range from -20°C to +100°C, it guarantees safe and stable operation in diverse environments. The plug is available in two practical versions: with a corrugated hose end or with a nut end for thermoplastic hoses, providing flexibility for different installation needs. Its free-flow design minimizes pressure drop while delivering excellent flow efficiency, making it an ideal choice for systems that require both precision and durability. Thanks to its robust construction and versatile configuration, the 21KA series plug is widely adopted across industries seeking compact, high-performance coupling solutions.