Abstract: A receiver drier bottle assembly (100) includes a plug opening (10) and a screw opening (40) formed on a receiver drier bottle cover (20) to receive a plug (30) and a screw (50) respectively. The plug (30) is formed with a plug cutout (32) that has first threads (32a). The screw opening (40) is partially overlapping the plug opening (10) and extends to a screw-receiving bore (42). The screw-receiving bore (42) is complementary to the plug cutout (32) and is formed with second threads (42a). The screw (50) with external threads (52) formed thereon is disposed partially on the plug cutout (32) to engage with the first threads (32a) and partially on the screw opening (40) to engage with the second threads (42a). Accordingly, the screw (50) immobilizes the plug (30) when the screw (50) is inserted in the screw opening (40).