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 557173 is a double-acting industrial component featuring a 4-inch piston diameter, a 0.75-inch stroke, and a 5/8-18 UNF-2A external piston rod thread based on the ISO 21287 norm. Operating on compressed air per ISO 8573-1:2010 [7:4:4] within a pressure range of 14.5 psi to 145 psi, this profile barrel actuator delivers a theoretical advancing force of 1059 lbf and a retracting force of 1017 lbf at 6 bar. It incorporates elastic cushioning rings at both ends, position sensing for proximity sensors, and a corrosion resistance class of 2 for moderate stress environments. 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 557173. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.