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 577166 is a double-acting industrial component featuring a 20 mm piston diameter, a 10 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 range, this unit delivers a theoretical retracting force of 141 N at 6 bar and incorporates self-adjusting pneumatic end-position cushioning. It is rated for an ambient temperature range of -20 °C to 80 °C, features ISO 14644-1 Class 5 cleanroom suitability, and supports position sensing via a proximity switch in any mounting position. Submit the exact part number, quantity, and application requirements to receive 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 577166. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.