The HENN HCW connectors are cooling water connectors that comply with VDA standards for cooling system stubs. HCW connectors have been in serial production since 2014. Due to their robustness, low assembly forces, safety aspects and high quality, they are increasingly replacing conventional clamped connections. These HENN connectors are manufactured as one metal part, which provides stability, coolant resistance and excellent corrosion properties. The manufacturing process is fully automated and monitored.

The HCW connectors can be delivered with EPDM or LSR sealing rings. In addition to the O-ring, a double lip sealing ring is also available, which offers low assembly forces and provides ideal protection against contamination.


  • Ideal for truck cooling applications
  • Water cooler, water pump, thermostat
  • Heat exchanger, coolant manifold, heating circuit
  • HCW crimped onto rubber hose


  • Connector: 1.4301 (AISI 304)
  • Spring clip: 1.4310 (AISI 301)
  • Spring clip cover: PA 6.6 / PA6
  • Sealing element: EPDM or LSR

Temperature range

  • EPDM: -20 – 135°C
  • LSR: -40 – 135°C (150°C, 22h)

Pressure range

  • 0.6 – 5.5 bar absolute


  • Secondary latching
  • Protection against disassembly
  • Outer rotation lock
  • Low assembly and disassembly forces
  • Protection against single-sided engagement
  • 100% traceability with Data Matrix code
  • Short installation length
  • Direct hose connection in the connector
  • Weight-saving
  • Low system and process costs
  • Complies with VDA standards

All good connections are judged by their most intricate points. The fastening of a connector with a screw or pressure clamp is a compromise. This is why HENN developed its own crimping method, which not only crimps the hose onto the connector permanently, but also considers all material properties in the crimping parameters. The connection, crimping system and parameters come from one source - nothing could be more secure or more economical. No additional fastening elements are required.