The connecting rod in a Copeland (or other semi‑hermetic reciprocating) compressor is a precision machined metal part that connects the piston to the crankshaft. It must withstand alternating compression/tension forces as the piston reciprocates to compress the refrigerant. It typically includes the rod body, small‑end bushing (wrist pin), big‑end bushing, and fasteners.
If you tell me the exact Copeland compressor model (e.g., 4D, 6D, 8RS, etc.), I can help identify the specific connecting rod part number that fits it.