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.

Festo
The Festo part number 558661 is a standard straight industrial component featuring a 3 mm nominal width and a push-pull structural design with a G1/8 external thread and a connection for a 4 mm outside diameter pneumatic tubing. This component operates across a pressure range of -0.095 MPa to 1.6 MPa and an ambient temperature range of -20 °C to 70 °C, utilizing a sealing ring on the screwed plug and an external hexagon AF 9 or internal hexagon AF 3 for mounting. Supplied in a pack size of 10 with a product weight of 6.1 g each, this RoHS-compliant part supports compressed air media as per ISO 8573-1:2010 [7:-:-] with lubricated operation possible. Submit the exact part number, quantity, and application requirements for a quote.
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.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
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.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against Festo 558661. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.