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 577171 is a double-acting industrial component featuring a 20 mm piston diameter, a 40 mm stroke, and an M8 external piston rod thread at one end conforming to ISO 21287. Operating on compressed air per ISO 8573-1:2010 [7:4:4] within a 1.5 bar to 10 bar pressure range, this unit delivers a theoretical retracting force of 141 N at 6 bar while utilizing self-adjusting pneumatic end-position cushioning. It incorporates position sensing via proximity switch, achieves Class 5 cleanroom suitability per ISO 14644-1, and withstands ambient temperatures from -20 °C to 80 °C with moderate corrosion stress resistance. Submit the exact part number, quantity, and application requirements for a formal quotation.
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 577171. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.