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Festo
531626
Quick coupling socket KD3-1/4-A
The Festo 531626 is a 5 mm nominal width industrial component featuring a G1/4 external thread pneumatic connection 1 and an operating pressure range of -0.095 MPa to 1.2 MPa (-0.95 bar to 12 bar / -13.775 psi to 174 psi). Built with a nickel-plated brass housing, NBR seals, a high-alloy stainless steel spring and ball, and a PA66-GF30 / TPE-U threaded seal, this 35 g part delivers a normal nominal flow rate of 185 l/min to 594 l/min (normalized to DIN 1343) and an ISO 8778 standardized nominal flow rate of 200.5 l/min to 643.9 l/min for compressed air media per ISO 8573-1:2010 [7:-:-]. It operates in ambient temperatures from -10 °C to 60 °C with a nominal tightening torque of 9.5 Nm at a ±15% tolerance, supports lubricated operation, possesses a corrosion resistance class (CRC) of 1, and conforms to VDMA24364-B1/B2-L LABS (PWIS) with RoHS-compliant materials. Submit the exact part number, quantity, and application requirements for a quote.
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Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Festo references — within one business day.
- Manufacturer
- Festo
- Part number
- 531626
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 531626.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Nominal width
- 5 mm
- Operating pressure for entire temperature range
- -0.095 MPa...1.2 MPa | -0.95 bar...12 bar | -13.775 psi...174 psi
- Normal nominal ow rate (normalized to DIN 1343)
- 185 l/min...594 l/min
- Nominal ow rate standardized according to ISO 8778
- 200.5 l/min...643.9 l/min
- Operating medium
- Compressed air as per ISO 8573-1:2010 [7:-:-]
- Information on operating and pilot media
- Lubricated operation possible
- Corrosion resistance class (CRC)
- 1 - Low corrosion stress
- LABS (PWIS) conformity
- VDMA24364-B1/B2-L
- Ambient temperature
- -10 °C...60 °C
- Nominal tightening torque
- 9.5 Nm
- Tolerance for nominal tightening torque
- ±15%
- Product weight
- 35 g
- Pneumatic connection 1
- External thread G1/4
- Note on materials
- RoHS compliant
- Seals material
- NBR
- Material of spring
- high-alloy stainless steel
- Housing material
- Brass, nickel-plated
- Material of threaded seal
- PA66-GF30 / TPE-U
- Threaded coupling material
- Brass, nickel-plated
- Ball material
- high-alloy stainless steel
- Circlip material
- high-alloy stainless steel
- Valve body material
- Brass
- Material releasing sleeve
- Brass, nickel-plated
Engineering context
Identification and RFQ Guidance
What to include in your RFQ
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Technical verification
Our sourcing response is prepared against Festo 531626. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.