Festo 153326 QSM-4-3 – Reducing Push-In Connector, Mini Series, 4 mm to 3 mm Tubing
The Festo 153326 (type QSM-4-3) is a straight reducing push-in connector from Festo’s QS mini series. It joins a 4 mm OD tube to a 3 mm OD tube in line, so it works as a quick, tool-free reducer between the two tube sizes. The connector uses the push-pull principle: push the tube in to connect it, then press the blue release ring to remove it.
The QSM-4-3 has a PBT housing, stainless steel tube clamping and NBR seals. It handles vacuum down to −0.95 bar and pressures up to 6 bar across the full temperature range, or up to 14 bar depending on temperature. At 2.1 g with a 1.7 mm nominal size, it is a neat way to step down from a 4 mm supply line to 3 mm tubing at miniature valves, cylinders, grippers or sensors.
What the Part Number Means
- 153326: Festo part number
- QS: Festo push-in fitting series
- M: mini size
- 4: port 1 for 4 mm OD tubing
- 3: port 2 for 3 mm OD tubing
Key Features
- Design: straight reducing connector, tube to tube
- Tubing: 4 mm OD to 3 mm OD
- Operation: push-pull principle with blue release ring
- Vacuum and pressure: from −0.95 bar up to 6 bar (up to 14 bar depending on temperature)
- Construction: lightweight PBT housing with stainless steel clamping
- Compatibility: lubricated operation possible
Key Specifications (Festo 153326)
- Type: QSM-4-3
- Series / size: QS push-in fittings, mini
- Design: straight, push-pull principle
- Pneumatic connection 1: push-in connector for 4 mm OD tubing
- Pneumatic connection 2: push-in connector for 3 mm OD tubing
- Nominal size: 1.7 mm
- Mounting position: any
- 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
- Release ring: POM, blue
- Tube clamping: high-alloy stainless steel
- Tube seal: NBR
- Corrosion resistance class: CRC 1
- Weight: 2.1 g
- Pack size: 10 pieces
- Conformity: RoHS compliant
Typical Applications
- Reducing from 4 mm to 3 mm pneumatic tubing
- Connecting miniature valves, cylinders and grippers to 4 mm supply lines
- Vacuum lines and sensor or instrumentation tubing
- Laboratory, electronics assembly and compact machine building
- Like-for-like replacement where Festo 153326 / QSM-4-3 is specified
Buy the Festo 153326 from Atlantech Drives
Atlantech Drives supplies the Festo 153326 QSM-4-3 reducing push-in connector with fast worldwide shipping and a 12-month warranty. Our experienced sales team can also quote 3 mm and 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
- 153326 / QSM-4-3 / QSM43
- Festo 153326 reducing push-in connector
- Festo QSM-4-3 push-in fitting, 4 mm to 3 mm
- Festo QS mini tube reducer 4/3 mm
- Festo 4 mm to 3 mm tube-to-tube union
- Festo push-in reducing coupling, mini series
- Festo Steckverbinder QSM-4-3 / racor reductor Festo 153326
