Rack Screws, Combo Hex Head & Flat, Self Tapping Type F, #12-24, 3/4" Long, Zinc
Type AB screws tap their own mating internal thread. They require a preformed hole for installation into metallic materials but necessary for wood or plastic materials. Combines locating point of Type A with thread size and pitch of Type B. Normal limitations of Type B apply. Preferred in high volume assembly where pneumatic equipment is used to drive the screw.