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laimana2000 01-28-2009 10:30 AM

how do I fasten and screw or bolt to concrete
Problem: I want to drill a hole into the concrete slab. (Done)
Now, what I need... is a way to fasten down a 2" Hitching Ring (Plate Type-zinc finish)
What kind of screws? (If a special kind)
Any info of any kind will be helpful. TY!

jerryh3 01-28-2009 10:44 AM

Are you talking about something like this?

jogr 01-28-2009 10:50 AM

tapcon screws should work. You'll need a hammerdrill to drill the holes.

yesitsconcrete 01-28-2009 05:21 PM

wait a minute, if the hole's ALREADY drilled, how did you know what size you needed w/o any anchor ? ? ? more'n likely a tapcon ( concrete screw ) is out & you'll need a drop-in anchor ( lead shield of proper dimension gets hammered into the hole then a bolt's turned into the anchor ),,, yes, concrete anchors're special :yes:

Bob Mariani 01-28-2009 06:34 PM

I agree.. tapcons are out if the hole is already drilled. And it is not really strong enough for your purpose. You will need a expanding anchor to match the hole you drilled and most likely it is best now to use an epoxy to seal it in place.

downunder 01-28-2009 06:48 PM

Lags and shields or Redheads should do it, but just to ask- How much pull are you planning on needing to hold?

yesitsconcrete 01-28-2009 08:28 PM

' hold ' as in shear or pullout strength - good point, fart ! :thumbsup:

Bronx 02-02-2009 09:47 AM

There are alot of ways.
Check out the installation videos on
There are many different options. On this site you can get technical information and they have videos of profesionals installing concrete anchors.

jamieh100 08-14-2013 07:14 PM

Yeah using the right Concrete Screw is important - here are some <a href="">Concrete Screw/Masonry Anchor</a> options with their pull out loads.

jamieh100 08-14-2013 07:15 PM

Concrete Screw/Masonry Screw Options I mean

user1007 08-14-2013 07:35 PM

Hope the OP gets back to us. We don't yet know what he is mounting and what it will hold.

I am wondering if one central hole, even with an anchor, will do the trick or if he is going to need some sort of ring on a deck plate fastened at four corners with bolts and anchors. And epoxy for the main shaft of the thing if there is one?

OP if you do use lead anchors, you may get an electrolytic reaction between unlike metals over time. Definitely seal with silicone to try and hold some of the moisture out of the cavity.

user1007 08-14-2013 07:37 PM

Never mind. Just looked. This thread is 4 years and 7 months old. I suspect he has resolved this by now.:thumbsup:

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