> For the complete documentation index, see [llms.txt](https://docs.revrobotics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.revrobotics.com/brushless/spark-flex/spark-flex-feature-description/mounting-holes.md).

# Mounting Holes

The mounting face of the SPARK Flex features six #10-32 threaded mounting holes on a 2 in bolt circle. Each hole has an absolute **maximum** depth of 0.25 in.    

<figure><img src="/files/UoNEOo6DRHyWGA5Z0WKh" alt=""><figcaption><p>SPARK Flex Mounting Hole Pattern</p></figcaption></figure>

{% hint style="danger" %} <mark style="color:red;">DO NOT</mark> exceed the maximum mounting screw depth of 0.25 in when mounting the SPARK Flex. Doing so will result in permanent damage to the SPARK Flex and will void the warranty.
{% endhint %}

Depth gauges are laser-etched into each side of the SPARK Flex body to make it easy to check that the chosen screw length will not violate the maximum depth.

<figure><img src="/files/LPY8iHaI0Jp3uqg9WrxN" alt=""><figcaption><p>SPARK Flex Mounting Screw Depth Gauge</p></figcaption></figure>

Simply check the screw length against the intended stack-up of structure and motor controller, and verify that it does not violate the maximum depth.

<figure><img src="/files/T0z9Kt7cqzQ1XKCskUbp" alt="" width="494"><figcaption><p>Checking Screw Length with SPARK Flex Mounting Screw Depth Gauge</p></figcaption></figure>