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Festo
531637
Quick coupling socket KD4-3/8-I
The Festo 531637 is an industrial component featuring a 7.2 mm nominal width, an internal thread G3/8 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). Constructed with a nickel-plated brass housing, threaded coupling, and inner raceway, NBR seals, and high-alloy stainless steel spring and circlip materials, this 82 g unit accommodates compressed air media per ISO 8573-1:2010 [7:-:-] with lubricated operation possible. It achieves a normal nominal flow rate of 261 l/min to 1350 l/min normalized to DIN 1343 and an ISO 8778 nominal flow rate of 282.9 l/min to 1463.4 l/min, operating across an ambient temperature range of -10 °C to 60 °C with a nominal tightening torque of 21.5 Nm at a ±15% tolerance. Submit the exact part number, quantity, and application requirements to request 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
- 531637
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 531637.
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
- 7.2 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)
- 261 l/min...1350 l/min
- Nominal ow rate standardized according to ISO 8778
- 282.9 l/min...1463.4 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
- Nominal tightening torque
- 21.5 Nm
- Tolerance for nominal tightening torque
- ±15%
- Product weight
- 82 g
- Pneumatic connection 1
- Internal thread G3/8
- Note on materials
- RoHS compliant
- Seals material
- NBR
- Material of spring
- high-alloy stainless steel
- Housing material
- Brass, nickel-plated
- Threaded coupling material
- Brass, nickel-plated
- Inner raceway material
- Brass
- Circlip material
- high-alloy stainless steel
- Material of pins
- high-alloy stainless steel
- Valve body material
- Brass
- Material releasing sleeve
- PP
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 531637. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.