Effortless push-in connection for pneumatic systems, suitable for compressed air and water, with a temperature range of -10°C to 80°C and operating pressures up to 6 bar.
Product Modelqst-3/8-8
Material Number153111
Product ID2959
Stock on Request
Last updated: 8/29/2026
Key Features
1
Effortless InstallationThe Festo QST-3/8-8 push-in T-fitting offers a simple and quick installation process, reducing setup time and increasing productivity. Its push-in design ensures a secure connection without the need for additional tools.
2
Versatile Operating RangeThis fitting operates within a broad temperature range of -10°C to 80°C, making it suitable for various industrial environments. It also supports pressures up to 6 bar, ensuring reliable performance in demanding applications.
3
High Corrosion ResistanceThe QST-3/8-8 features a nickel-plated brass screwed plug and a PBT housing, providing high corrosion resistance (CRC 1). This ensures the fitting remains durable and functional even in harsh conditions.
4
Compliant with Industry StandardsThe Festo QST-3/8-8 is designed to meet ISO 8573-1:2010 standards for compressed air quality and ISO 14644-1 for cleanroom applications. This ensures compatibility with a wide range of pneumatic systems.
Technical Specifications
Detailed engineering parameters based on manufacturer documentation
Specifications may be subject to change without notice
Parameter
Value
Parameter
Value
Size
Standard
Nominal width
6.7mm
Type of seal on screwed plug
Coating
Mounting position
Any
Design
T-shape
Pack size
10
5
Compact DesignWith a nominal width of 6.7 mm, the QST-3/8-8 push-in T-fitting is designed to minimize space usage, making it ideal for applications where component density is crucial. Its T-shape design also enhances flow efficiency and reduces backpressure.
Structural design
Push-pull principle
Operating pressure for entire temperature range
-13.775psi 87psi
Temperature-dependent operating pressure
-13.775psi 203psi
Information on operating pressure
Water: max. 0.6 MPa at max. 50 °C
Operating medium
Compressed air as per ISO 8573-1:2010 [7:-:-] Water (liquid, ice-free)
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
15.5Nm
Tolerance for nominal tightening torque
± 20%
Product weight
35g
No. of outlets
2
No. of supply lines
1
Type of mounting
External hexagon, AF 17
Pneumatic connection 1
External thread R3/8
Pneumatic connection 2
for pneumatic tubing outside diameter 8 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
Manufacturer ID
153111
Festo QST-3/8-8 Push-in T-Fitting for Pneumatic Applications | INDSLT
