Fitting most high-volume machining applications and used on almost any type of surface, machine screws are fully threaded fasteners with flat ends that fit either a pre-tapped hole or match with a machine nut for firmer tightening. Typically used in high-volume automotive or machinery assembly. These feature a round head with a phillips drive and are 18.8 stainless steel to protect the screw against corrosion. (SRMS834CP188)