The ultra-miniature M3 threaded quick disconnect assembly is comprised of a brass internal end and a stainless steel external end. The entire assembly weighs only 3.4 grams. The internal end is designed with an automatic shut-off valve and a M3 internal thread. It is only about 16.7 mm long and has a 6mm hexagonal body. The external end is designed with a M3 external thread and includes a captured O-ring seal for leak-tight connection. It is only about 11mm long and has a 5mm hexagonal body.