This would be the minimum length of screw that can be used.
Using wall plugs in concrete.
The usual method is to drill a hole of the correct size and then insert a plastic wall plug to screw into.
Wall plugs are very versatile and using them you can add fixings for thermalite blocks brickwork stone walls or concrete providing the masonry material is in good condition.
Buy a set of universal wall plugs if your item weighs less than 15 lbs.
Using your fingers push the wall plug into the pilot hole.
Tap the plastic anchor into the hole.
Concrete concrete block mortar brick tile and stone.
Drill a hole in the wall for each anchor.
An awl has the advantage of creating less drywall dust.
If it does the universal version is likely to work well.
Insert the plug into the pilot hole.
I provide a wall plug colour chart for quick iden.
Masonry and concrete anchor types are considered light duty medium duty or heavy duty based on how much weight they can support.
It should fit snugly but drive in easily with a hammer.
In this video i show how to use wall plugs and how to select the right size wall plug screw and drill bit.
Stop once the head of the wall plug is flush against the wall.
Jonniejoejonson 28 jun 2020.
If possible purchase wall plug and screw combos to ensure they will fit.
After pushing it into the wall as far as possible with your fingers use a hammer to carefully push it in further.
Drill a pilot hole at the proper location with a hammer drill and masonry bit to the depth your screw will penetrate.
A 2x4 needs to be fastened to concrete.
If the wall plugs and screws are sold separately test the screws by inserting them inside the plug.
Adding the 1 1 2 of the 2x4 plus a minimum of 1 embedment 2 1 2.
Can you use wall plugs with concrete screws or are they only meant for being used with woodscrews.
Concrete anchors types vary and include concrete screws hammer set anchors lag shields lead screw anchors plastic wall plugs anchor bolts and more.
The point of the concrete screws is they just need a pilot hole and don t need a wall plug.
Thanks to any responders.
However because the breeze block is quite soft it works much better with wall plugs.