NPCK-C-D-G18-K6 – Festo Pneumatic Fittings

USD $ 27.30 USD $ 22.39

SKU: Festo 1366257

Manufacturer Part Number: Festo 1366257
Festo Pneumatic Fittings: NPCK-C-D-G18-K6
OEM Spec Ref 

The Festo NPCK-C-D-G18-K6, MPN 1366257, pneumatic fittings represent a pinnacle of engineering excellence, offering precision, reliability, and versatility in pneumatic system installations. Meticulously crafted with durability and performance in mind, these fittings ensure seamless integration and secure connections in various industrial applications, making them an indispensable component in modern pneumatic systems.

Key Features:

  • Durable Construction: Crafted from high-quality materials, the NPCK-C-D-G18-K6 fittings boast robust construction, ensuring durability and resilience in demanding industrial environments. With corrosion-resistant coatings and precision machining, these fittings guarantee long-lasting performance and reliability.
  • Secure Connections: Engineered for secure and leak-free connections, these fittings feature precision-machined threads and sealing elements, providing tight seals and preventing air leaks. Their innovative design ensures reliable pneumatic connections, minimizing downtime and optimizing system efficiency.
  • Versatile Compatibility: Designed for compatibility with a wide range of pneumatic tubing and components, including polyurethane, nylon, and PTFE tubing, these fittings offer versatility in system design and integration. With various thread sizes and configurations available, they adapt to diverse application requirements with ease.
  • Easy Installation: Featuring a user-friendly design, the NPCK-C-D-G18-K6 fittings facilitate quick and effortless installation, minimizing setup time and reducing labor costs. Their simple push-to-connect mechanism eliminates the need for tools, allowing for hassle-free assembly and maintenance.


  • Enhanced System Performance: By ensuring secure and reliable connections, these fittings optimize pneumatic system performance, minimizing air loss and pressure drops. This results in improved overall system efficiency and productivity.
  • Reduced Downtime: With their leak-free design and durable construction, the NPCK-C-D-G18-K6 fittings minimize the risk of system failures and unplanned downtime, ensuring continuous operation and maximum uptime in industrial environments.
  • Cost Savings: By reducing air leaks and minimizing maintenance requirements, these fittings help lower operational costs and improve the overall cost-effectiveness of pneumatic systems over their lifespan.


  • Automated Machinery: Essential for pneumatic control systems in automated machinery, including robotics, packaging equipment, and assembly lines, ensuring precise actuation and movement of components.
  • Material Handling Systems: Ideal for pneumatic conveyance systems and material handling equipment, providing reliable connections for pneumatic cylinders, valves, and actuators in dynamic environments.
  • Industrial Automation: Critical for pneumatic automation applications in various industries, such as automotive, aerospace, and electronics manufacturing, enabling precise control and manipulation of workpieces and components.
  • General Pneumatics: Suitable for a wide range of pneumatic applications across industries, including air compressors, pneumatic tools, and air-powered machinery, offering versatile and reliable pneumatic connections.

The Festo NPCK-C-D-G18-K6 pneumatic fittings exemplify Festo’s commitment to innovation and excellence, providing reliable, efficient, and versatile solutions for pneumatic system installations in industrial automation.

Technical Data

Feature Specification
Nominal width 2.9 mm
Type of seal on screwed plug Sealing ring
Mounting position Any
Design Straight design
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
Information on operating pressure Water: max. 0.6 MPa at 0 – 85 °C
Water vapor: 0 – 0.15 MPa, 0 – 1.5 bar, 0 – 22 psi
Operating medium Compressed air as per ISO 8573-1:2010 [7:-:-] Water (liquid, ice-free)
Water vapor
Information on operating and pilot media Operation with oil lubrication possible
Corrosion resistance class (CRC) 4 – Particularly high corrosion stress
LABS (PWIS) conformity VDMA24364-B2-L
Suitability for the production of Li-ion batteries Metals with more than 1% by mass of copper, zinc or nickel by mass are excluded from use. Exceptions are nickel in steel, chemically nickel-plated surfaces, printed circuit boards, cables, electrical plug connectors and coils
For use in the food industry See supplementary material information
Note on temperature of medium Water vapor: max. 120 °C
Degree of protection IP69K
Ambient temperature -20 °C … 120 °C
Note on ambient temperature Using suitable tubing and maximum operating pressure of the tube, the NPCK can be used from -40 to 60 °C.
Nominal tightening torque 6.5 Nm
Note on the nominal tightening torque 4 Nm +/-10% for NPCK to MPA-C
Tolerance for nominal tightening torque ± 10%
Product weight 14.1 g
Pneumatic connection 1 External thread G1/8
Pneumatic connection 2 for pneumatic tubing outside diameter 6 mm
Material of union nut High-alloy stainless steel
Material of screwed plug High-alloy stainless steel
Note on materials RoHS-compliant
Sealing ring material PEEK
Weight 0.0141 kg