Abstract: A hermetic refrigeration compressor of the single reciprocating piston type as a valve plate extending over the open end of the cylinder and a first cylinder head secured to the valve plate and enclosing a discharge planum. The first cylinder head includes a recessed portion adjacent a suction port and has a bridge portion extending across the recess above the valve plate. The suction side includes an integral suction muffler and second cylinder head which fits within the recess to include a planum overlying the suction port and a U-shaped spring clip engages the bridge with one leg between the bridge and the second cylinder head to hold it in place while the clip includes a second leg which extends over the top of the bridge and hooks on the side to hold the second cylinder head and the spring clip in place.