# 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="https://4148826207-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fe0CWwhMSoCEH7NLVoLhF%2Fuploads%2FWm1qXb0hNAW5e30XZi1z%2FSPARK%20Flex%20-%20Anatomy_Outside.png?alt=media&#x26;token=ba214a9e-edc9-41fe-b220-ae281c7d9432" 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="https://4148826207-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fe0CWwhMSoCEH7NLVoLhF%2Fuploads%2Fkiqjdxgaj5lXrnG4pd2R%2Fimage.png?alt=media&#x26;token=5e98ba43-0570-49e9-bc77-e3b54fb3752e" 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="https://4148826207-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fe0CWwhMSoCEH7NLVoLhF%2Fuploads%2FbNKjHEja3ydkVqTcE3e5%2FScrewDepthGoodBad.png?alt=media&#x26;token=8b7cb3b3-d274-4838-8425-960eaf7b5b56" alt="" width="494"><figcaption><p>Checking Screw Length with SPARK Flex Mounting Screw Depth Gauge</p></figcaption></figure>