QSL-1/4-10 – Push-In L-Fitting – Festo Pneumatic Fittings

USD $ 7.35 USD $ 6.03

SKU: Festo 153051

Manufacturer Part Number: Festo 153051
Festo Pneumatic Fittings: QSL-1/4-10
OEM Spec Ref 

The Festo QSL-1/4-10, with MPN 153051, is an exceptional pneumatic fitting designed to enhance the functionality and reliability of pneumatic systems. This fitting is engineered to ensure robust and leak-proof connections, making it an indispensable component in a wide array of industrial applications. Its precise construction guarantees improved system integrity and performance.

Key Features:

  • Leak-Proof Design: The QSL-1/4-10 features a superior seal and locking mechanism, ensuring that connections are both secure and resistant to leaks, which is vital for maintaining system pressure and efficiency.
  • High-Durability Materials: Constructed from premium materials, this fitting is capable of withstanding the rigorous demands of any industrial environment, ensuring durability and a long service life.
  • Versatile Fit: With a 1/4-inch thread size and compatibility with 10 mm tubing, it offers flexible use across various pneumatic systems and configurations.
  • User-Friendly Installation: It includes an intuitive push-to-connect mechanism that simplifies the installation process, allowing for quick and easy setup without the need for specialized tools.
  • Compact Profile: The compact design of this fitting enables it to be integrated into space-limited areas, maintaining functionality without compromising on system design or accessibility.


  • Improved System Stability: By providing a secure connection, the QSL-1/4-10 minimizes potential disruptions caused by air leaks, thereby enhancing the stability and reliability of pneumatic systems.
  • Cost Efficiency: Effective sealing and connection stability reduce the need for frequent maintenance and downtime, leading to significant cost savings in operational expenses.
  • Extended Equipment Lifespan: Secure and stable connections reduce wear and tear on connected pneumatic components, thus extending their usable life and reducing the need for replacements.
  • Enhanced Safety: The fitting’s reliable performance and resistance to leaks contribute to safer operations in industrial environments, adhering to high safety standards.


  • Automated Production Lines: Ideal for systems requiring reliable air connections to maintain efficiency and productivity in high-demand manufacturing settings.
  • Pneumatic Transport Systems: Ensures effective air flow management in systems designed for the transportation or movement of materials via pneumatic conveyance.
  • Maintenance and Troubleshooting: An essential tool for technicians needing robust, easy-to-install fittings for maintenance or emergency repairs in industrial and manufacturing facilities.
  • Diverse Industrial Applications: From packaging machinery to automation robotics, this fitting is suitable for a broad range of applications that demand reliability and precision.

The Festo QSL-1/4-10 Pneumatic Fitting stands as a testament to Festo’s commitment to advancing pneumatic technology, offering a robust and reliable solution that enhances the efficiency and effectiveness of industrial pneumatic systems.

Technical Data

Feature Specification
Size Standard
Nominal width 8 mm
Type of seal on screwed plug Coating
Mounting position Any
Design L-shape
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
Cleanroom class Class 4 according to ISO 14644-1
Ambient temperature -10 °C … 80 °C
Nominal tightening torque 9 Nm
Tolerance for nominal tightening torque ± 20%
Product weight 23 g
Type of mounting External hexagon, AF 14
Pneumatic connection 1 External thread R1/4
Pneumatic connection 2 for pneumatic tubing outside diameter 10 mm
Releasing ring color Blue
Material of screwed plug Brass, nickel-plated
Note on materials RoHS-compliant
Housing material PBT
Releasing ring material POM
Material of tubing seal NBR
Material of tube retaining claw High-alloy stainless steel
Weight 0.023 kg