KS2-CK-3 – Quick Coupling Plug – Festo Couplings

USD $ 9.87

SKU: Festo 4091

Manufacturer Part Number: Festo 4091
Festo Couplings: KS2-CK-3
OEM Spec Ref 

The Festo KS2-CK-3 Couplings, with MPN 4091, are precision-engineered components designed to ensure reliable and secure pneumatic connections in various industrial applications. These couplings are crafted to offer seamless integration and robust performance, enhancing system stability and operational efficiency.

Key Features:

  • Secure and Reliable Connections: Specifically designed to provide a tight and secure fit, these couplings ensure reliable connections that prevent leaks and maintain consistent air pressure within pneumatic systems.
  • High-Quality Materials: Constructed from durable materials, the KS2-CK-3 couplings are built to withstand the demanding conditions of industrial environments, offering long-lasting performance and durability.
  • Easy Installation and Removal: Engineered for convenience, these couplings feature a simple mechanism that allows for quick and easy installation and removal, facilitating efficient system maintenance and assembly.
  • Versatility in Application: Compatible with a wide range of pneumatic tubing and components, these couplings provide great flexibility in system design and are suitable for a variety of industrial applications.
  • Compact Design: Their compact size ensures that they can be integrated into systems with limited space, providing essential functionality without compromising system layout.


  • Enhanced System Efficiency: By maintaining airtight connections, these couplings contribute to the efficiency and reliability of pneumatic processes, enhancing overall system performance.
  • Reduced Operational Costs: The robust design minimizes the need for frequent replacements and maintenance, thereby reducing operational costs associated with downtime and repairs.
  • Increased Equipment Lifespan: Secure connections prevent wear and tear on connected components, extending their lifespan and reducing the likelihood of system failures.
  • Improved Safety: Reliable connections improve the safety of pneumatic operations, reducing the risk of leaks and other issues that could lead to hazardous situations.


  • Manufacturing Facilities: Ideal for use in automated manufacturing lines where reliable pneumatic connections are crucial for maintaining high-quality production outcomes.
  • Automotive Assembly: Plays a critical role in automotive assembly systems, where precise and secure pneumatic connections are necessary for efficient operations.
  • Pneumatic Control Systems: Essential for ensuring stable and secure connections in pneumatic control systems, enhancing the accuracy and reliability of the control mechanisms.
  • General Industrial Applications: Suitable for a broad range of industrial applications, these couplings enhance operational precision and reliability across various sectors.

The Festo KS2-CK-3 Couplings stand as a testament to Festo’s dedication to providing high-quality pneumatic solutions, ensuring optimal performance and reliability in connecting and maintaining pneumatic systems across diverse industrial environments.

Technical Data

Feature Specification
Nominal width 2 mm
Operating pressure for entire temperature range -0.095 MPa … 1.2 MPa
Operating pressure for entire temperature range -0.95 bar … 12 bar
Operating pressure for entire temperature range -13.775 psi … 174 psi
Standard nominal flow rate 68 l/min … 84 l/min
Nominal flow rate standardized according to ISO 8778 73.7 l/min … 91.1 l/min
Operating medium Compressed air as per ISO 8573-1:2010 [7:-:-]
Information on operating and pilot media Operation with oil lubrication possible
Corrosion resistance class (CRC) 1 – Low corrosion stress
LABS (PWIS) conformity VDMA24364-B1/B2-L
Ambient temperature -10 °C … 60 °C
Product weight 4 g
Pneumatic connection 1 for pneumatic tubing outside diameter 4 mm
For barbed fitting, inside diameter 3 mm, with union nut
Material of union nut Wrought aluminum alloy, nickel-plated
Note on materials RoHS-compliant
Information on materials Brass, nickel-plated
Weight 0.004 kg