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Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
Global industrial sourcing · Houston, Texas info@mropartsrfq.com
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Festo
531621
Quick coupling socket KD2-CK-3
The Festo 531621 is an 11 g industrial component featuring a 2 mm nominal width and an operating pressure range of -0.095 MPa to 1.2 MPa for compressed air media according to ISO 8573-1:2010 [7:-:-]. Constructed with a nickel-plated brass housing, brass valve body, NBR seals, high-alloy stainless steel internal springs, and an anodized wrought aluminum alloy union nut, this unit supports lubricated operation with a normal nominal flow rate of 68 l/min to 88 l/min normalized to DIN 1343. It provides pneumatic connection 1 for 4 mm outside diameter tubing or a 3 mm inside diameter barbed fitting with a union nut, maintaining a CRC rating of 1 and VDMA24364-B1/B2-L LABS conformity within ambient temperatures of -10 °C to 60 °C. Submit the exact part number, quantity, and application requirements to request a quote.
Request pricing and availabilityCommercial response within one business day for your destination and required quantity.
Request a QuoteWhy no listed price?
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
- 531621
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 531621.
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
- 2 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)
- 68 l/min...88 l/min
- Nominal ow rate standardized according to ISO 8778
- 73.7 l/min...95.4 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
- Product weight
- 11 g
- Pneumatic connection 1
- for pneumatic tubing outside diameter 4 mm | For barbed tting, inside diameter 3 mm, with union nut
- Material of union nut
- Wrought aluminum alloy, anodized
- Note on materials
- RoHS compliant
- Seals material
- NBR
- Material of spring
- high-alloy stainless steel
- Housing 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 531621. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.