The standard sizes used by Parco and the other major O-ring manufacturers in the United States are defined by Aerospace Standard AS568. There are 369 standard sizes of O-rings with inside diameters ranging from 0.029 to 25.940 inches and cross sections ranging from 0.040 to 0.275 inch. View Parco’s O-ring Size Chart for detailed dimensions.
Parco offers general-purpose and high-performance O-rings in over 500 compounds. That means we likely have a compound specifically formulated for your application.