The optoelectronic device includes a sleeve, an insert body, a ferrule, a lens, an optical subassembly, an electrical connector, a substrate, a cover, and a panel nut. The sleeve includes seating surface, an aperture, and thread form. The panel nut has a thread form, and a seating surface. The thread form of the panel nut is complimentary to the thread form of the sleeve so that the panel nut is removeably mountable on the sleeve. In a mounted position, the thread form of the panel nut fully engages the thread form of the sleeve so that the seating surface of the of the panel nut contacts a first one surface of a bulkhead and the seating surface of the sleeve contacts another surface of the bulkhead so that the device is securely mounted to the bulkhead.