Check the listing for details. Black Oxide Slotted Button Head Screws, 10Pcs 8-40 x 3/4" Machine Screw. Condition: New. Listed at 18.99 USD. [Durable material]: Made of carbon steel, it has high hardness, good corrosion resistance, not easy to rust, stable material performance, and is very suitable for indoor and outdoor use.[Features]: The slotted drive machine screws have a black surface treatment. After installation, the semicircular screw head is exposed on the installation surface. The thread is clear, the pitch is uniform, and the tightening effect is good.[Easy to install]: When installing, just loosen the old screw and screw in the new screw. Our machine screws have a slotted oval head, which makes installation easier and faster. Before purchasing, please carefully check the detailed size of the screws you need.[Application]: These slotted button head screws are suitable for a variety of applications, such as machinery, automobiles, electronics, and furniture assembly.