EIA-310-E references but does not dictate screw type. However, it specifies the hole size, which dictates that you can use:
Equipment racks are the physical foundation of modern data centers, server rooms, and telecommunications closets. Without strict manufacturing guidelines, hardware from different vendors would not fit together. Eia Eca-310-e Pdf
Standardized mounting allows for faster installation, maintenance, and air-flow management. Key Dimensions in EIA/ECA-310-E EIA-310-E references but does not dictate screw type
It is important to note that this is a voluntary standard. No governing body enforces compliance, and it is up to the manufacturer to build their cabinets in accordance with it. This is why you will see many products labeled as "EIA/ECA-310-E compliant" or "EIA-310 compliant," indicating that they are designed to meet the standard's mechanical requirements. This is why you will see many products
The standard defines several critical dimensions that every network engineer and facility manager must know.