Star Drive Pan Head Machine Screws Black Oxide Stainless Steel #10-24 Star drive (6 lobe) drive style can prevent accidental stripping during an installation Star drive grips the head better allowing for more torque on a screw Black oxide treatment adds another layer of corrosion and abrasion resistance to stainless steel Black oxide finish is infused with wax or oil during the process to comply with military specifications as a class 4 finish Star drive pan head machine screws feature a pan head and a torx style 6 lobe drive. Star drive machine screws are often used with a nut or driven into tapped holes. These screws tend to be used to hold machinery together but can serve other purposes as well. Black oxide machine screws are most commonly used in the following industries: automotive, motorcycle, guns, knives, and archery.