# System Standards REV ION was created to minimize the required tools, hardware, and cost to build a robot. To accomplish this the REV ION System has standardized the following throughout its products: ### #10 Clearance Holes * All hardware is #10-32 sized * Any tapped holes are #10-32 * Can use 3/16in rivets ### 1/2 in Hole Pitch * Linear pattern or grid on structural components * Radial pattern on circular components * Some circular components also have the linear pattern for ease of attaching to structure * Combined with MAX Spline to form the MAX Pattern ### 1/2 in Rounded Hex Shaft * 13.75mm diameter rounded corners for ease of assembly in bearings * Fits standard 1.125in OD Bearings ### Fractional Axial Width * Components together along a shaft always have a total width on a fractional interval --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.revrobotics.com/ion-build/home/system-standards.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.