Pad Fitting with #8 Male Insert O-Ring and High Side R134a Port - Caterpillar Pad Fitting with #10 Male Insert O-Ring and Low Side R134a Port - Caterpillar Pad Mount Fitting with #8 Male Insert O-Ring Pad Mount Fitting with #10 Male Insert O-Ring Compressor Pad Fitting to #8 Male Insert O-Ring - Caterpillar Compressor Pad Fitting to #10 Male Insert O-Ring - Caterpillar