Every once in a while people call us and wonder how to fix a problem with the KEEP-NUT system. It would seem as if people are either not drilling down far enough, or they’re using the wrong drill bit.  Occasionally people will have an issue where they also drilled too wide. However, the most common problem we find is that the post is spinning, which happens when KEEP-Nut is not drilled to the proper depth according to the specs that state you need to drill down to 6.5mm (which is close to ¼ inch in depth) or it will appear like what a stripped bolt would look like on a construction site or a home. It is something that can be fixed. This, however, is a consequence of the hole being drilled down deeper than the required.

Fixing this issue is not difficult. Inside of every kit (Starter and Trial) you get the “Go/No Go” gauge. You will first want to use this to check on the depth before you move forward and try to insert the post/bolt into the recently drilled hole.

• If the “Go” side of the gauge fits properly into the hole, that means the current dimension is good. (This also has notches on the side that will allow you to see where it is on the mm depth)
• If it doesn’t fit, and it fits on the “No Go” side, the hole is too wide. This can be a common occurrence if you are not using the proper drill bit. Here are the descriptions:
  • For drilling granite, marble, porcelain and engineered stone, use this drill bit, https://www.chemical-concepts.com/keep-nut-1-2-gas-drill-bit-for-cnc.html
  • For all other surfaces, use this drill bit, https://www.chemical-concepts.com/keep-nut-11-8mm-drill-bit-w-stop-collar-for-solid-surface-and-plastics.html
• Typically, if it does not fit and you are getting a spinning post, you can use your “Go/No Go” gauge as a punch to open the hole by lightly hammering the gauge into the hole to the proper depth, thus stopping the post from spinning and allow the KEEP-NUT system to work as it is intended.

For more information or video instructions on how to make this work, please check out the video made for you:

KEEP-NUT is great for granite, ventilated facades, undermount sinks, wall mounted signs, wall covering décor, and more!

DID YOU KNOW…Each KEEP-NUT is rated and can support up to 562 lbs per anchor.

While we have a video to help and this post, we understand not everyone will be able to do this on their own. We are here to help!  If you have any other questions or concerns about your KEEP-NUT system, please do not hesitate to reach out.  Call us, toll-free, at 1-800-220-1966 or send us an email at [email protected]. We look forward to spinning you in the right direction.