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Old 06-02-2012, 10:24 PM   #1
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square recessed screw head question


For the life of me I can't figure out why some screws have a recessed square. What is the name of the screwdriver I need so I don't sound like a complete moron at the hardware store? I have several flat head and several phillips but not this kind.

My kitchen cabinets have an outdated scalloped board above the sink and in front of a window. I'm trying to remove it.

I have a socket set, but nothing this small.

thank you

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Old 06-02-2012, 10:30 PM   #2
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square recessed screw head question


Ask for a 'square drive' bit or screwdriver--

Many multi purpose screw drivers come with square drive bits--there are 3 sizes--

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Old 06-02-2012, 10:30 PM   #3
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square recessed screw head question


Robertson screwdriver. (Some people call it a Roberts Head.)
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Old 06-03-2012, 01:52 AM   #4
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square recessed screw head question


It's another awesome canadian invention!
I have seen them in #4,5,6,8,10,12,14 sizes of screws so make sure you get the right size screwdriver.
#6 and #8 screws are the most common it seems.
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Old 06-03-2012, 07:54 AM   #5
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square recessed screw head question


thanks.

I didn't measure it but it's tiny. It's frustrating to have a project on hold for something like this.
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Old 06-03-2012, 09:07 AM   #6
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square recessed screw head question


Square and Torx heads are very common. Almost all decking screws come with one or the other.
Pick up a set like this and you'll have all the bits you'll ever need.

http://www.homedepot.com/Tools-Hardw...&storeId=10051
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Old 06-08-2012, 11:03 PM   #7
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square recessed screw head question


These screws were the brain wave of a man named Robertson.
The main advantage of these is that they stay on the screwdriver when starting the screw.
Electricians prefer these as its easier to start screws that are in difficult places.
They are very popular in Canada!

Robertson tried to sell his idea to Henry Ford, when the Model T's were being built. However, the deal fell apart when Henry insisted on getting a royalty on every Robertson screw sold.
Instead, Henry made a deal with Philips (star) and thats why Philips screws are extensively used in the US.

I believe that the Robertson patent is now owned by US interests and the square head screws are being used to a greater extent in the USA.
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Old 06-08-2012, 11:54 PM   #8
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square recessed screw head question


I like them. You don't have issues with the bit poping out....

If you do any kind of fine woodworking, you would know them well. Almost all pocket hole screws are square heads...and it's not just a 'Canadian' thing....
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Old 06-09-2012, 11:05 AM   #9
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square recessed screw head question


A little useless info!
http://www.collectionscanada.gc.ca/c...27-2008-e.html

"Inventor: Peter Lymburner Robertson (1879-1951)
After badly cutting his hand while using a slot-headed screwdriver, Peter Lymburner Robertson invented the square-headed screwdriver and screw in 1908. He received the Canadian patent for his invention in 1909. A person could drive a screw more quickly with this new design and the screw was self-centering so only one hand was needed. On top of that, the driver fit more tightly in the screw's head, thereby reducing the chance of the screwdriver slipping out. The Robertson screw was a big hit! Industry loved it because it sped up production and resulted in less product damage. No one has been able to improve on this design in all the years that have followed!"
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Old 06-09-2012, 06:03 PM   #10
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square recessed screw head question


I've read that there is a difference between Robertson and square drive, in that Robertsons are slightly tapered, and actually better.....but the U.S makes square drive, because of a patent issue.

Out of curiosity, I looked at Mc Feelys site and didn't see any information as to which they sell, or if it really makes any difference in terms of which drivers you use. Or are all square drive screws just called "Robertson" now?
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Old 06-10-2012, 12:06 AM   #11
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square recessed screw head question


Quote:
Originally Posted by Gary Sutherland View Post
I've read that there is a difference between Robertson and square drive, in that Robertsons are slightly tapered, and actually better.....but the U.S makes square drive, because of a patent issue.

Out of curiosity, I looked at Mc Feelys site and didn't see any information as to which they sell, or if it really makes any difference in terms of which drivers you use. Or are all square drive screws just called "Robertson" now?
I have a screwdriver that appears to be tapered, but its not! Its just a straight shaft that had the square end ground by a grinding wheel. The taper(if you will) has a curve from the grinding wheel but the tip that engages the screw is parallel.
The best Robertson screwdrivers have a malable steel shaft with a very hard, square tip inserted in the end.
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Old 06-10-2012, 10:33 PM   #12
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square recessed screw head question


Just when I thought I was done with Roberts screws for good I discover an outside spigot, that needs replaced, has a slightly larger Roberts screw than what I used for the kitchen project.
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Old 06-12-2012, 10:35 PM   #13
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square recessed screw head question


#2 or #3 square drive. The number 2 is usually trim head screws, #3 decking size screws.

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Old 06-13-2012, 07:02 AM   #14
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square recessed screw head question


1 is trim 2 is deck 3 who knows
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Old 06-13-2012, 08:59 AM   #15
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square recessed screw head question


I'll try to measure the sq hole before I go to H.D.

thanks.

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