Festo 153429 QSKL-1/8-4 – Self-Sealing Push-In L-Fitting, R1/8 Male Thread to 4 mm Tubing
The Festo 153429 (type QSKL-1/8-4) is a self-closing push-in L-fitting from Festo’s QSK series. It connects 4 mm OD pneumatic tubing at 90° to an R1/8 male thread. Its key feature is the integrated shut-off function: when the tube is removed, the fitting closes automatically, so small tubing or downstream components can be disconnected without shutting off the supply line.
The fitting is orientable, so the tube outlet can be turned to the required direction after installation. The tapered R1/8 thread has a self-sealing PTFE coating, which allows the fitting to be re-used up to five times. The housing is PBT, the screw-in stud is nickel-plated brass, the tube clamping is stainless steel and the tube seal is NBR. The tube side uses the push-pull principle with a blue release ring.
What the Part Number Means
- 153429: Festo part number
- QSK: self-sealing (self-closing) push-in fitting series
- L: L-fitting (90° elbow)
- 1/8: R1/8 male thread
- 4: for 4 mm OD tubing
Key Features
- Self-closing: shuts off automatically when the tube is removed
- Design: 90° push-in L-fitting, orientable
- Connections: R1/8 male thread to 4 mm OD tubing
- Sealing: PTFE thread coating, reusable up to five times
- Mounting: 10 mm external hexagon
- Operation: push-pull principle with blue release ring
Key Specifications (Festo 153429)
- Type: QSKL-1/8-4
- Series: QSK push-in fittings, self-sealing
- Design: L-shape (90°), orientable, push-pull principle
- Pneumatic connection 1: male thread R1/8
- Pneumatic connection 2: push-in connector for 4 mm OD tubing
- Nominal size: 1.5 mm
- Tubing insertion depth: 12.5 mm
- Mounting: external hexagon, 10 mm
- Max. tightening torque: 7 Nm
- Seal on screw-in stud: PTFE coating (reusable up to 5 times)
- Operating medium: compressed air to ISO 8573-1:2010 [7:-:-]; lubricated operation possible
- Operating pressure, full temperature range: −0.95 to 6 bar
- Temperature-dependent operating pressure: −0.95 to 14 bar
- Ambient temperature: −10 to +80 °C
- Materials:
- Housing: PBT
- Screw-in stud: nickel-plated brass
- Release ring: POM, blue
- Tube clamping: high-alloy stainless steel
- Tube seal: NBR
- Weight: 17 g
- Pack size: 1 piece
- EAN: 4052568034627
Typical Applications
- Small connections where tubing must be removed without depressurising the line
- Quick-change connections on fixtures, test rigs and maintenance points
- 4 mm pilot, sensor and supply lines
- Valves, cylinders and manifolds with R1/8 ports
- Like-for-like replacement where Festo 153429 / QSKL-1/8-4 is specified
Buy the Festo 153429 from Atlantech Drives
Atlantech Drives supplies the Festo 153429 QSKL-1/8-4 self-sealing push-in L-fitting with fast worldwide shipping and a 12-month warranty. Our experienced sales team can also quote 4 mm tubing, other QS fittings, and Festo valves and cylinders. Request a quote today for price and availability.
More Festo Products
- Festo 153336 Push-In Fitting
- Festo 6211 MFH Solenoid Valve
- Festo 173129 MEH Solenoid Valve
- All Festo products
Manufacturer website: Festo
Keyword Synonyms
- 153429 / QSKL-1/8-4 / QSKL184
- Festo 153429 self-sealing L-fitting
- Festo QSKL-1/8-4 push-in elbow, R1/8 to 4 mm
- Festo self-closing push-in fitting 4 mm, 90°
- Festo QSK shut-off push-in elbow R1/8
- Festo orientable push-in L-fitting with automatic shut-off
- Festo L-Steckverschraubung selbstdichtend QSKL-1/8-4 / racor codo autoobturante Festo 153429
