Premium Quality & Durable Construction: Crafted using top- carbon steel with a black nickel-plated finish, these screws and nuts offer high hardness and reliable performance. With their corrosion-resistant properties, trust that these fasteners are designed to last, offering you for your money. Versatile Applications: perfect for anchoring your rack server cabinets, server shelves, A/V device enclosures, and much more. These M6 cage nuts and screws boast universal compatibility, fitting all square-hole racks and cabinets perfectly, making them a highly versatile tool in any hardware setup. Intuitive Square Cage Nut Design: Our cage nuts are specifically designed for racks and cabinets with square holes. They facilitate the mounting of standard rack mountable equipment into your server rack or cabinet, ensuring a secure and stable fit. Standard Metric Conformance: Our screws and lock nuts adhere to the standard metric system with an impressive average error of less than 0.01mm. The threads are uniformly stressed and sharply defined, reducing the likelihood of deformation and slippage during installation. Work more efficiently with their deep, clear flat crossheads. Please note:There is a slight color difference or difference in kind, it does not affect the use, please do not mind, thank you! Colour:Black Material:carbon steel Package Contents: 50 * Computer Rack Mount Cage Screws and Nuts Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.