Confirm the exact configuration
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
6257
Quick connector CK-1/4-PK-6-KU
The Festo part number 6257 is a straight industrial component featuring a 5.3 mm nominal width, a G1/4 external thread for pneumatic connection 1, and an 8 mm outside diameter tubing connection or 6 mm inside diameter barbed fitting with a nut for pneumatic connection 2. Constructed with POM union nuts and screwed plugs utilizing a sealing edge design, this component operates across a pressure range of -0.95 bar to 10 bar for compressed air and up to 0.6 MPa for water at temperatures between -10 °C and 60 °C. It accommodates lubricated operation, conforms to VDMA24364-B1/B2-L LABS standards, and requires a nominal tightening torque of 5.5 Nm with a ±20% tolerance in a pack size of 10. 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
- 6257
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 6257.
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
- 5.3 mm
- Type of seal on screwed plug
- Sealing edge
- Mounting position
- Any
- Design
- Straight design
- Pack size
- 10
- Operating pressure for entire temperature range
- -0.095 MPa...1 MPa | -0.95 bar...10 bar | -13.775 psi...145 psi
- Information on operating pressure
- Water: max. 0.6 MPa at max. 50 °C
- Operating medium
- Compressed air as per ISO 8573-1:2010 [7:-:-] | Water (liquid, ice-free)
- Information on operating and pilot media
- Lubricated operation possible
- LABS (PWIS) conformity
- VDMA24364-B1/B2-L
- Ambient temperature
- -10 °C...60 °C
- Nominal tightening torque
- 5.5 Nm
- Tolerance for nominal tightening torque
- ±20%
- Pneumatic connection 1
- External thread G1/4
- Pneumatic connection 2
- for pneumatic tubing outside diameter 8 mm | for barbed tting, inside diameter 6 mm, with nut
- Material of union nut
- POM
- Material of screwed plug
- POM
- Note on materials
- RoHS compliant
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 6257. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.