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Topic: Screws (Read 891 times) previous topic - next topic

Screws

I'm having trouble locating someone that sells the Robertson screws that are so common in our rigs. I got some a few years ago at Fastenal but they haven't come through. These are the square drive 1/2" and 3/4" self tapping and regular screws. The size I got last time was 10x16x 1/2" and 3/4".  Anyone have a source? Thanks.
jor
93 225
95 300
97 270
99 320

Re: Screws

Reply #1 –
Find a Lawsons sales rep or dealer
1988  40' Grand Villa Cat 3208t

Re: Screws

Reply #2 –
I assume Robertson screws are the same as square drives?
I buy a lot of my hardware from McMaster-Carr  McMaster-Carr
Scroll down on the left to select the square drive style option.
John Fitzgerald
1991 U300 (SAI) Side Aisle Island Bed 40'
Detroit 6V92 with Allison Retarder
Meridian (Boise), Idaho

Re: Screws

Reply #4 –
McFeelys is a good source.  #8 screws might be a better fit.  Pan head or flat head Square drive. If a #8 wver strips out you can go to a #10.  Self drilling work well in fiberglass.

Screws & Fasteners - Screws & Fasteners | McFeely's

Screws & Fasteners - Screws & Fasteners | McFeely's

Screws & Fasteners - Screws & Fasteners | McFeely's

You can get similar scews at most hardware stores or Amazon.


Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Screws

Reply #5 –
A while back my Shipper in our Company asked if I would buy him some Phillips head wood screws for the export crates, he said he had received messages from some of our US customers that they don't like our Robertson screws to be used on the crate lids. I was in our local Canadian Home Depot sometime later and remembered about the screws, I could not find any Phillips head wood screws on the shelf so I asked an Associate for help, he said they are available but this Home Depot only has Robertson. I told him the story and he explained to me that the Canadian Robertson head is a taper but the US design is a straight wall head.
You learn something every day!

P. L. Robertson - Wikipedia
Geoff & Pat Haygarth
1994 U240 SBI GV 36ft Cat 3116, Allison 6 speed
 Build #4448
2015 Jeep Wrangler Sport

Re: Screws

Reply #6 –
Here is a list of screw drive types.
List of screw drives - Wikipedia
The Robertson drive is also known as a square. It is not clear that they are actually different.  Most of the square drive screws that I use will fit on and stay on an unworn driver bit.  It may be that the bits are slightly tapered as well.  Square drive bits seem to last longer than phillips bits for example.  My FT seems to have a mix of both.  So I keep a selection of bit types and lengths on hand.

It is very convenient when the screw fits on the driver and stays there.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Screws

Reply #7 –
Found the Robertson self tapping screws at Ace. They had to order them. They are made by Hillman. The 10x3/4 item number is 71004 and the 1" is 71005. They are $11.50 and $12.50, respectively (box of 100). I also picked up a couple of boxes of the regular, non self tapping screws which, interestingly, are about half that price. I am sure you can find a better deal on these with a little research but Ace sure is handy.
jor

93 225
95 300
97 270
99 320

Re: Screws

Reply #8 –
 "I told him the story and he explained to me that the Canadian Robertson head is a taper but the US design is a straight wall head.
You learn something every day!"


Wow, Geoff. 

That explains it!  I ran into this just recently.  I needed to remove a #2 square drive screw but my driver would not fully seat.  It just stripped out the top of the screw socket.  I thought the screw was defective, but now I know it was simply designed that way. 

Thanks for the enlightenment. 

Richard
Jan & Richard Witt
1999 U-320  36ft WTFE
Build Number: 5478 Motorcade: 16599
2011 Jeep Wrangler Unlimited w/Air Force One
Jan: NO5U, Richard:KA5RIW
The selected media item is not currently available.

Re: Screws

Reply #9 –
To add further confusion the Japanese Phillips head is different also. So if you own a Japanese vehicle get a set of JIS Phillips head screwdriver s to avoid stripping the heads. JIS is Japanese Industry Standard and the flute angle is different.
Old Phart Phred, EIEIO
89 GV ored 36' #3405 300 hp cat 3208 ATAAC side radiator, mountain tamer exhaust brake

Re: Screws

Reply #10 –
And Robertson bits work great in a stripped phillips screw as well
Toby a 94 u280
Cummins 8.3
6 speed Allison
Exhaust brake


Adopted by Derek and Annabelle

Re: Screws

Reply #11 –
After reading most of the attachments, I find it hard to believe a little screw could cause that much legalese !
1993 U300, 6v92
build 4366
USAF retired, Flight Engineer, C124, C130
 ATP, A & E.  & ex AI

Re: Screws

Reply #12 –
Quote: , I find it hard to believe a little screw could cause that much legalese"

Bill, it is a thing that is in the news nearly every day, and many famous couples have gone thru' it as well as everyday people!
Tough trying not to get caught I guess!! 8)  8)
JohnH
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: Screws

Reply #13 –
I was speaking of the screws used on many Foretravels that is square and the law suites.
1993 U300, 6v92
build 4366
USAF retired, Flight Engineer, C124, C130
 ATP, A & E.  & ex AI