Set the correct spacing for rack-mounted components with a hardware kit designed for clean, repeatable installs. The RP404923-B includes four 0.25 spacers and four M4 x 18 mm PPHS screws, giving installers the parts needed to establish controlled stand-off distance and secure mounting in a compact package. In rack environments, small hardware choices affect fit, serviceability, and long-term stability. Proper standoff spacing can help preserve clearance, reduce stress on mounted parts, and support a more consistent installation across multiple units. That matters when you are building to a standard, replacing components in the field, or trying to avoid improvised hardware that slows down service. This kit is suited to professional deployments where the right fastener and spacer combination is worth more than a generic assortment. It is a focused accessory for teams that want predictable results, cleaner assembly, and fewer surprises during installation.