Robertson Head Screw (Square Drive Screw) - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-29-2015, 11:40 AM   #1
Senior Member
 
Name: Huck
Trailer: ParkLiner
Virginia
Posts: 573
Robertson Head Screw (Square Drive Screw)

I wanted to remove a wood shelf in my Parkliner. The screws have a square screw drive which I had never come across before, so had to do some research.

The proper name is Robertson-head screws, but commonly called square screw or square drive screw. You can buy a screwdriver or bit at a big box store or most hardware stores. I bought 1 bit for about $2.50.

They come in different sizes, so I took a screw with me when I bought the bit. It was a #2 which seems to be the most commonly used size.

To get the screw out (to take with me) I used a Phillips head screwdriver to break it loose and then a pair of pliers to unscrew it. A better choice would be a straight screw driver that fits across the square, but I didn't have one that would fit.

I did read a post where at least 1 other brand of fbg's uses square screws. I believe they are used more often in Europe than US.

Just thought I would share and maybe save someone else some research time if you have never come across square screws before. In the PL they are used for securing the wood shelf which is above and to the right of the ac. If you look in the shower, you will also see some that secure the shelf through the shower wall. There are probably other places they are used, but I haven't looked anywhere else yet.
__________________

__________________
Huck is offline   Reply With Quote
Old 05-29-2015, 11:50 AM   #2
Senior Member
 
Name: JD
Trailer: Scamp 16 Modified (BIGLY)
Florida
Posts: 1,045
The square drive screws are very popular in Canada and those and Torx are becoming more popular in the US as they have less of a problem with "CamOut" than Phillips and straight slot screws. They also tend to stay on the driver better when handling to drive.
The Torx was developed for the automotive industry since they can be handled better by automatic feeders and don't cam out when driven or removed.
I have used both in my rebuild of my 1986 Scamp. I found square drive in the cabinets along with phillips, but of course no Torx.
__________________

__________________
redbarron55 is offline   Reply With Quote
Old 05-29-2015, 12:07 PM   #3
Senior Member
 
Name: Jack L
Trailer: Bigfoot B-17 CB
Washington
Posts: 1,226
I retired from the tool and equipment business and have lots of hand tools. I have not counted but Ill guess I have at least 25 square drive screwdrivers and bits. The square drive fasteners are great. Much easier to work with than philips or straight blade. Ever see Reed & Prince fastener ?? It looks like a Philips but it isn't . Try finding a bit or driver for Reed & Prince fasteners, then be ready for a shock when you find the price.

Square drive screws are great and much easier to use if you have the proper tools. Once you get accustomed to them I think you will like them.

Square drive fasteners come in size 1,2 and 3. My Bigfoot has size 1 and 2.
__________________
Jack L is offline   Reply With Quote
Old 05-29-2015, 12:36 PM   #4
Senior Member
 
Carol H's Avatar
 
Name: Carol
Trailer: 22' Airstream Formerly 16' Scamp
British Columbia
Posts: 11,731
Registry
Quote:
Originally Posted by redbarron55 View Post
The square drive screws are very popular in Canada and those and Torx are becoming more popular in the US as they have less of a problem with "CamOut" than Phillips and straight slot screws. .
The Robertson screws which are as suggested very common and popular in Canada has an interesting history and some of that history some might suggest is why its use has not been embraced in US.

From the Website "The Perfect Screw? A concise history of the Robertson Head"

"So the question remains: Why has the Robertson not managed to secure a stronger foothold throughout the world? Why is its popularity limited to Canada and a small number of specialty industries? When the Robertson was first introduced it enjoyed a great deal of popularity. Each Model T manufactured in Canada was held together by about 700 Robertsons"

"Using Robertsons reduced the production time on each vehicle so significantly that Henry Ford wanted to use them on his American assembly lines as well. Ford, however, didn’t want to just buy the screws, he wanted to buy the rights as well, and when Roberson refused to sell, Ford turned to Philips, and it appears America (and the world) has never looked back. "
Carol H is offline   Reply With Quote
Old 05-29-2015, 12:57 PM   #5
Senior Member
 
Bob Miller's Avatar
 
Name: Bob
Trailer: 1973 Hunter Compact II
California
Posts: 7,912
I don't know what other make RV's every one is working on, but my experience with many brands is that the #2 square drive is the weapon of choice for almost all American RV builders, especially in the sticky world.


If you go into many RV suppliers and as for "RV drive screws" that's what they will sell you. As I recall Scamps are held together with them, look under the benches.


Mfg like them because you can put on on the tip of a power driver and drive it almost in any angle/position without a starting punch/hole or it falling off the driver or slipping/burring out when it bottoms.
__________________
Bob Miller is offline   Reply With Quote
Old 05-29-2015, 01:49 PM   #6
Senior Member
 
David Tilston's Avatar
 
Name: Dave W
Trailer: Trillium 4500 - 1977, 1978 (2), 1300 - 1977, 1973, and a 1972
Alberta
Posts: 5,317
Registry
If I have a choice, I choose Robertson screws.
__________________
David Tilston is offline   Reply With Quote
Old 05-29-2015, 02:03 PM   #7
Senior Member
 
Jay H's Avatar
 
Name: Jay
Trailer: Boler 1300
Ontario
Posts: 254
This thread made me laugh out loud. As a proud Canadian, the Robertson is my fastener of choice, in fact I have replaced all of the screws and a lot of the rivets in my Boler with #3 (or a red Robbie). be aware though that a true Robertson has a tapering of the bit whereas an American Square bit does not. I may be biased but I have always felt the tapered bit grabbed and held better. Long live the Robertson!
__________________
Jay H is offline   Reply With Quote
Old 05-29-2015, 02:41 PM   #8
Senior Member
 
honda03842's Avatar
 
Name: Norm and Ginny
Trailer: Scamp 16
Florida
Posts: 7,300
My first trailer, a Sunline, used Robertson screws and I've used them ever since.
__________________
Norm and Ginny

2014 Honda Odyssey
1991 Scamp 16
honda03842 is offline   Reply With Quote
Old 05-29-2015, 04:14 PM   #9
Senior Member
 
Bob Miller's Avatar
 
Name: Bob
Trailer: 1973 Hunter Compact II
California
Posts: 7,912
Now I am seeing two different names; Robertson and Square Drive.
Are they the same or, if different, different enough to make a difference?
__________________
Bob Miller is offline   Reply With Quote
Old 05-29-2015, 04:21 PM   #10
Senior Member
 
rbryan's Avatar
 
Name: Robert
Trailer: 2015 Escape 19 "Past Tents" 2015 F150 Lariat Ecoboost Crew Cab
Texas
Posts: 905
Registry
Robertson Head Screw (Square Drive Screw)

A very common fastener in Canada. Don't buy an Escape if you don't like Robertson screws-- ours is full of them. One of the first things I bought for the trailer was a good set of Robertson screwdrivers. Most of the screws are #2, but there are several #3 as well.

The American "square" drive is just a clone of the Robertson, produced when the Robertson patent ran out. Sometimes they have a slight taper and sometimes not. Robertsons have the slight taper.

Sent from my iPhone using Fiberglass RV
__________________
"You can't buy happiness, but you can buy an RV. And that is pretty close."
rbryan is online now   Reply With Quote
Old 05-29-2015, 04:46 PM   #11
Senior Member
 
Jon Vermilye's Avatar
 
Name: Jon
Trailer: 2017 Escape 21
Oswego, NY
Posts: 1,407
Registry
I've told this story before, but it is worth repeating - We had a Canadian tour come through our theatre many years back, and needed to "adjust" some hardware. We were all complaining about the weird screw heads until we watched one of their techs place a 3" sheet rock screw on the end of a driver, then put it into a piece of wood at arms length away.

After that we talked our local hardware supplier into stocking Robertson screws for us. We had to buy them by the 25 lb box, but it was worth it. We were using & praising them for years before they became generally available...
Jon Vermilye is offline   Reply With Quote
Old 05-29-2015, 06:22 PM   #12
Senior Member
 
Carol H's Avatar
 
Name: Carol
Trailer: 22' Airstream Formerly 16' Scamp
British Columbia
Posts: 11,731
Registry
Quote:
Originally Posted by Bob Miller View Post
Now I am seeing two different names; Robertson and Square Drive.
Are they the same or, if different, different enough to make a difference?
Technically the same I suppose but up here in the North its just called a Robertson Screw Driver.

Until today I had actually never heard anyone call it a square drive.
Carol H is offline   Reply With Quote
Old 05-29-2015, 07:15 PM   #13
Senior Member
 
Name: Jack L
Trailer: Bigfoot B-17 CB
Washington
Posts: 1,226
I've been using square drive screws for over 30 years and prefer using them whenever I can. I have a box of screws I picked up at a garage sale that can be driven with a square drive tool or a Philips. Here in the Pacific northwest they are fairly common. My Bigfoot has some #1 square drive screws on the cabinet hinges.


Robertson patented the design and when his patents ran out and other manufacturers started making them, they couldn't call them "Robertson" because of trademark or copyright laws so the name square drive was used.


Taper or not, they are great. With most fasteners coming from China today, I suspect true Robertson brand fasteners are rare. I wish I could get accustomed to the metric system as easily as I adapted to the square d
rive fastener.
__________________
Jack L is offline   Reply With Quote
Old 05-29-2015, 07:33 PM   #14
Senior Member
 
Dennis mn's Avatar
 
Name: Dennis
Trailer: Scamp
Minnesota
Posts: 261
My 1978 Pop-Up was assembled with square drive screws, so I've dealt with them for a long time.

My current source for quality hardware including Robertson Screws is Lee-Valley Hardware, a Canadian company.
__________________

__________________
1999 Scamp Fifth Wheel, pulled by a 2014 Nissan Frontier Pro4-X
Dennis mn is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Front wheel drive, rear wheel drive, all wheel drive, and weight-distributing hitches Meg A. Towing, Hitching, Axles and Running Gear 14 04-26-2011 10:04 PM
Phillips vs Robertson screws Bridget T Care and Feeding of Molded Fiberglass Trailers 14 08-12-2010 07:45 PM
Wanted: older, square style ('83) Scamp door window KarinP Classified Archives 6 07-21-2009 07:42 PM
Square Door on a Casita? Robin G General Chat 6 05-28-2009 03:58 PM
Scamp Square Corner Windows Steve R General Chat 3 09-14-2007 07:56 PM

» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:51 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.