Screws

Homervanderjazz · 02-10-2012, 09:53 AM

Hi, when looking at screws to buy in my local store the majority are wood ones, I am planning to drill into house brick and then use plug along with the screw. So my question is can I use a wood screw for this purpose? Thanks

joecaption · 02-10-2012, 10:05 AM

No, a wood screw is tapered.
What is it your planning on mounting with these screws?
Cheap not going to work very well plastic inserts use sheetmetal screws.
Lead anchors use lag screws.
(there called inserts not plugs)

Homervanderjazz · 02-10-2012, 11:10 AM

Hi I am just putting up Shelves, when I go onto screwfix.com and look at screw section the masonry screws seem to be ones that are to be used without plugs. Which screws would suitable on this site to be used with plugs? Thanks

PaliBob · 02-11-2012, 04:51 AM

Quote:

Originally Posted by Homervanderjazz

.....am just putting up Shelves.....

Homer, This should help with Screw Anchors:
http://en.wikipedia.org/wiki/Screw_anchor
.
For installing shelves on brick walls:
http://www.home-shelving-guide.com/i...g-shelves.html

Hope this helps. Use sheet metal screws with plastic anchors

KatHelms · 02-16-2012, 08:27 PM

Is there any reason why you should use a plug/screw in brick instead of a masonry screw by itself? Or is it a matter of what is strong enough for the application?

I usually use masonry screws when I need to secure something to my block foundation (like a fire extinguisher hangar - I had them handy, although it seemed like overkill - those blue screws have some bite)

Missouri Bound · 02-16-2012, 11:24 PM

Quote:

Originally Posted by KatHelms

Is there any reason why you should use a plug/screw in brick instead of a masonry screw by itself? Or is it a matter of what is strong enough for the application?

I usually use masonry screws when I need to secure something to my block foundation (like a fire extinguisher hangar - I had them handy, although it seemed like overkill - those blue screws have some bite)

It depends more on the application than any other factor....and how it looks when finished in some circumstances. And yes, the Tapcons hold very well.

Homervanderjazz · 02-17-2012, 05:44 AM

thanks for all the replies folks

PaliBob · 02-17-2012, 03:03 PM

Quote:

Originally Posted by KatHelms

.....those blue screws have some bite)

Those blue screws most commonly called Tapcon® screws are self Tapping screws that are most commonly used in concrete, hence the name:Tapcon. The Tapcons are awesome in Concrete but I would not use them in brick. Brick is after all just a block of clay baked in a kiln. Concrete bricks would be the exception but they are not as common.

Besides the unknown strength of a brick, especially older construction bricks, a drawback of using a Tapcon in brick is that if it is removed even temporarily they cannot be reinstalled in the same hole because now the original sized hole has been tapped out by the first installation.

jlmran · 02-19-2012, 09:38 PM

Quote:

Originally Posted by PaliBob

Those blue screws most commonly called Tapcon® screws are self Tapping screws that are most commonly used in concrete, hence the name:Tapcon. The Tapcons are awesome in Concrete but I would not use them in brick.

All the Tapcons I've bought came with a masonry bit. Are they really self-tapping?

Missouri Bound · 02-19-2012, 09:48 PM

Quote:

Originally Posted by jlmran

All the Tapcons I've bought came with a masonry bit. Are they really self-tapping?

Yes, they are self-tapping. Self-DRILLING screws do not require a pilot hole, but I haven't seen those for concrete......at least not yet.

Oops..I said that backward. Self tapping screws have their own bit at the tip...they do not reuire a hole

jlmran · 02-19-2012, 09:54 PM

Quote:

Originally Posted by Missouri Bound

Yes, they are self-tapping. Self-DRILLING screws do not require a pilot hole, but I haven't seen those for concrete......at least not yet.

So all screws are self-tapping?

Is a 10-24 a screw or a bolt?

Missouri Bound · 02-19-2012, 10:03 PM

Quote:

Originally Posted by jlmran

So all screws are self-tapping?

Is a 10-24 a screw or a bolt?

Now that's a matter of semantics.

jlmran · 02-19-2012, 11:15 PM

Quote:

Originally Posted by Missouri Bound

Now that's a matter of semantics.

Which question?

Missouri Bound · 02-19-2012, 11:26 PM

Quote:

Originally Posted by jlmran

So all screws are self-tapping?

Is a 10-24 a screw or a bolt?

Generally, and from my personal experience, 1/4" or larger is a bolt, less than 1/4" is referred to as a machine screw. But there are lag bolts smaller than 1/4" and dowel screws larger than 1/4".....like I said, semantics

The most common reference will be used and acknowledged.

PaliBob · 02-20-2012, 01:34 PM

How did Tapcon get its name?
“An anchor that TAPs its own threads/grooves into CONcrete.”
above quote from the Tapcon website http://www.tapcon.com/history.asp

The hole diameter is smaller than the screw diameter, e.g.a ¼” screw is installed in a 3/16” hole. The screw jambs itself into the walls of the hole by self-tapping the hole to a larger diameter. If the Tapcon screw is removed then re-installed in good quality concrete it wil probably be ok, at least for the first time. Old poorer quality concrete or mortar is not going to hold as good, same for brick.
.