QS-3/8-6 – Push-In Fitting – Festo Pneumatic Fittings

USD $ 6.72 USD $ 5.51

SKU: Festo 190645

Manufacturer Part Number: Festo 190645
Festo Pneumatic Fittings: QS-3/8-6
OEM Spec Ref 

The Festo QS-3/8-6, with MPN 190645, is an essential pneumatic fitting, expertly designed to provide secure and reliable connections in pneumatic systems. This product is expertly crafted to integrate effortlessly into a variety of industrial applications, delivering superior performance and enhancing system stability.

Key Features:

  • Reliable Connection: Ensures a tight and secure pneumatic connection, crucial for maintaining system integrity and preventing leaks.
  • High-Quality Materials: Made from nickel-plated brass and high-alloy stainless steel, offering excellent corrosion resistance and durability.
  • Compact Design: Its minimalistic design is perfect for installations in confined spaces, maximizing utility without compromising performance.
  • Ease of Use: Features a simple push-in design for quick and easy assembly, reducing setup time and maintenance efforts.
  • Versatile Application: Compatible with a wide array of tubing sizes and types, providing flexibility across different pneumatic applications.


  • System Reliability: By securing pneumatic connections, it enhances the reliability and safety of the entire system.
  • Operational Efficiency: Quick and easy installation reduces downtime and increases productivity within industrial setups.
  • Cost Effectiveness: Durable materials and efficient design reduce the need for frequent replacements, cutting down on long-term maintenance costs.
  • Environmental Resistance: The fitting’s robust construction ensures it can withstand harsh environmental conditions, making it suitable for a variety of industrial environments.


  • Automated Production Lines: Ideal for dynamic environments where frequent adjustments are necessary, ensuring consistent performance.
  • Maintenance and Repair Operations: Simplifies the maintenance process with easy disassembly and reassembly, supporting routine checks and repairs.
  • Fluid Handling Systems: Suitable for applications involving compressed air, vacuum, and even water, providing a versatile solution for fluid management.
  • General Industrial Use: Can be utilized in various industrial sectors for a broad range of pneumatic applications, enhancing system functionality and reliability.

The Festo QS-3/8-6 stands out as a benchmark in pneumatic fittings, offering a practical solution for managing pneumatic connections and optimizing the performance of industrial processes.

Technical Data

Feature Specification
Size Standard
Nominal width 5 mm
Type of seal on screwed plug Coating
Mounting position Any
Design Straight design
Pack size 10
Structural design Push-pull principle
Operating pressure for entire temperature range -0.095 MPa … 0.6 MPa
Operating pressure for entire temperature range -0.95 bar … 6 bar
Operating pressure for entire temperature range -13.775 psi … 87 psi
Temperature-dependent operating pressure -0.095 MPa … 1.4 MPa
Temperature-dependent operating pressure -0.95 bar … 14 bar
Temperature-dependent operating pressure -13.775 psi … 203 psi
Maritime classification See certificate
Operating medium Compressed air as per ISO 8573-1:2010 [7:-:-] Water as per manufacturer’s declaration at www.festo.com
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 … 80 °C
Nominal tightening torque 15.5 Nm
Tolerance for nominal tightening torque ± 20%
Product weight 28 g
Type of mounting External hexagon, AF 17
Pneumatic connection 1 External thread R3/8
Pneumatic connection 2 for pneumatic tubing outside diameter 6 mm
Releasing ring color Blue
Note on materials RoHS-compliant
Housing material Brass, nickel-plated
Releasing ring material POM
Material of tubing seal NBR
Material of tube retaining claw High-alloy stainless steel
Weight 0.028 kg