Loading... Please wait...

3.5" F-C Concrete Fasteners - Box of 60

  • 3.5" F-C Concrete Fasteners
1.00 LBS
Calculated at checkout

Product Description

3.5” F-C Concrete Fastener. These are used to anchor up to 2.5” insulation board to the crawl space foundation walls.

Each box contains 60 fasteners and a 6-lobe bit.

Find Similar Products by Category

Write your own product review

Product Reviews

  1. Pre drilled holes 4 Star Review

    Posted by on 30th Dec 2016

    Agree with earlier poster about needing pilot holes, but in my application 5/32 was too small of a pilot hole. I kept shearing off the fasteners driving them in. I experimented and 3/16 worked for me, drilled with a hammer drill and even then, I had to drill/redrill (slightly enlarge the hole) to ensure avoiding shearing. The 3/16 is the same bit I used for the christmas tree fasteners.

  2. Pilot hole 4 Star Review

    Posted by on 30th Nov 2016

    5/32 pilot holes are too small. I amputting pilot holes into concrete block and the screws are shearing off when they bind in the pilot hole. I am going to experiment with larger sizes.It would seem like a vendor recommendation should accompany the product, like they supply the Torx bit driver.

  3. They work well, but must be inserted into pre-drilled holes! 4 Star Review

    Posted by on 8th Oct 2015

    We are using the fasteners to attach Bora-Foam to CMU walls. The fasteners were not shipped with any instructions as to bit size, and the web site did not mention it either. After making test holes with different masonry bit sizes, we settled on 5/32" and this seems to be just right. I purchased several boxes of fender washers to use with the screws so they won't pull through the foam, and we are able to use only 6 screws for each 4x8 board.

Our Newsletter

Add to Wish List

Click the button below to add the 3.5" F-C Concrete Fasteners - Box of 60 to your wish list.

You Recently Viewed...