M5X15/BN1023 is a hex head cap screw manufactured by Bossard, a Swiss hardware manufacturer. It is made from high-grade steel, zinc plated for improved corrosion resistance, and uses an external hex drive. This type of cap screw has a shorter head than other cap screws, allowing for clearance in confined spaces. It is suitable for a wide range of applications, including wood, metal, and plastic. The BN1023 finish is a bright nickel plating, providing additional protection against corrosion.