6255

Name: Festo 6255 Quick connector CK-1/8-PK-6-KU
Brand: Festo

Quick connector CK-1/8-PK-6-KU

The Festo part number 6255 is a straight industrial component featuring a 4.4 mm nominal width, an external thread G1/8 pneumatic connection 1, and a pneumatic connection 2 for an 8 mm outside diameter tubing or a 6 mm inside diameter barbed fitting with a nut. Constructed with a POM union nut and screwed plug incorporating a sealing edge, this RoHS-compliant part supports compressed air and liquid water operating media across an operating pressure range of -0.95 bar to 10 bar. It operates within an ambient temperature range of -10 °C to 60 °C and has a nominal tightening torque of 3.25 Nm with a ±20% tolerance, packaged in a quantity of 10. Request a quote by submitting the exact part number, quantity, and application requirements.

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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: 6255
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Technical Specifications

Nominal width: 4.4 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: 3.25 Nm
Tolerance for nominal tightening torque: ±20%
Pneumatic connection 1: External thread G1/8
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

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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.

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Technical verification

Our sourcing response is prepared against Festo 6255. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.