GOOD TOOLS FOR GOOD WORKS, IMSCREWS FIX YOUR HOME. M4 x 1" Button Head Socket Cap Bolts Screws 18-8 Stainless Steel Screw ISO7380 | by IMSCREWS?? Button socket cap screws feature a low profile, cylindrical head with a plain finish. The internal hexagonal drive hole, also known as a hex-socket drive, requires a hex socket wrench drive commonly called an Allen wrench, hex key or Allen key driver for quick and easy insertion. With its flush profile, button socket cap screws are ideally utilized in areas with little overhead or side clearance and suitable for light duty applications like machine assembly with removable parts and panels. ?? These screws are available with a variety of head shapes, which determine how the screw interacts with the mating surface, and drive styles, which determine the type of tool required to install the screw. ?? This screws is organized by Size / Type in a Transparent Storage bag for Quick Access and Protection in an IMSCREWS plastic bag. SPECIFICATIONS: ??Size: M4 x 1"(25mm)??Thread Pitch: 0.7mm??Thread Diameter: 4mm??Head Diameter: 7.5mm??Head Height: 2.3mm??Screw Length: 1"(25mm)??Package Included: 50pcs??CONTACT US: ?? If you have any questions when using, please feel free to contact us by Amazon message. We will provide customers the most satisfactory solution. We¡¯re always at your service.