KD3-1/8-I – Quick Coupling Socket – Festo Couplings

USD $ 16.38

SKU: Festo 531627

Manufacturer Part Number: Festo 531627
Festo Couplings: KD3-1/8-I
OEM Spec Ref 

The Festo KD3-1/8-I Coupling, with MPN 531627, is a high-quality pneumatic fitting designed to ensure secure and reliable connections within pneumatic systems. Tailored for diverse industrial applications, this coupling facilitates seamless integration and optimal airflow, enhancing system performance and operational efficiency.

Key Features:

  • Secure Connection: Provides a tight and secure fit, ensuring that connections are leak-proof, which is critical for maintaining system pressure and efficiency.
  • High-Quality Materials: Constructed from durable materials, the KD3-1/8-I is designed to resist wear and corrosion, withstanding the harsh conditions typical in industrial environments, promising long-lasting performance.
  • Easy Installation: Features a user-friendly design that allows for quick and simple installation, minimizing downtime and facilitating maintenance and system upgrades.
  • Versatility: Compatible with a wide range of pneumatic components, this coupling offers great flexibility in system design, making it suitable for various applications.
  • Compact Design: Its compact size ensures it fits easily into space-constrained areas without sacrificing its effectiveness or functionality.


  • Enhanced System Reliability: By providing a secure and leak-proof connection, it significantly increases the reliability of pneumatic systems, preventing air leaks and pressure drops.
  • Reduced Maintenance Costs: The robust construction and reliable performance of the KD3-1/8-I reduce the need for frequent maintenance and replacements, leading to cost savings.
  • Improved Safety: Secure connections improve the overall safety of pneumatic systems, reducing the risk of accidental disconnections and leaks that could pose safety hazards.
  • Operational Efficiency: Quick and easy installation and compatibility with various components streamline system assembly and modifications, enhancing overall operational efficiency.


  • Automated Manufacturing Lines: Ideal for applications in manufacturing facilities where reliable pneumatic connections are crucial for continuous and efficient production.
  • Control Systems: Plays an essential role in pneumatic control systems, where stable and secure connections are necessary for accurate and reliable system performance.
  • Assembly Processes: Suitable for assembly lines that require frequent reconfiguration, offering flexibility and ease of use to adapt to different setups.
  • General Pneumatics: Applicable across a broad range of pneumatic applications in various industries, from automotive to electronics, enhancing operational precision and reliability.

The Festo KD3-1/8-I Coupling stands out as a testament to Festo’s commitment to quality and innovation in pneumatic technology, offering a robust and efficient solution for managing secure connections within industrial pneumatic systems. This coupling is indispensable for ensuring the efficient and safe operation of diverse pneumatic applications.

Technical Data

Feature Specification
Nominal width 5 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 185 l/min … 603 l/min
Nominal flow rate standardized according to ISO 8778 200.5 l/min … 653.7 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
Nominal tightening torque 5 Nm
Tolerance for nominal tightening torque ± 15%
Product weight 32 g
Pneumatic connection 1 Internal thread G1/8
Note on materials RoHS-compliant
Seals material NBR
Material of spring High-alloy stainless steel
Housing material Brass, nickel-plated
Threaded coupling material Brass, nickel-plated
Ball material High-alloy stainless steel
Circlip material High-alloy stainless steel
Valve body material Brass
Material releasing sleeve Brass, nickel-plated
Weight 0.032 kg