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#1 |
Member
Join Date: Oct 2009
Location: columbus, georgia
Posts: 385
Likes: 66
Liked 309 Times in 88 Posts
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Thanks for the help, a #2 square did the job although it didn't make sense to me!!
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#2 |
VIP Member
Join Date: Jun 2006
Posts: 3,422
Likes: 532
Liked 333 Times in 180 Posts
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They use that style of drive because you can drive the screw in from an odd angle and also they do not strip out the square drive area like a Phillips drive will. FES 387
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#3 |
Senior Member
Join Date: Sep 2016
Posts: 884
Likes: 209
Liked 311 Times in 175 Posts
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That screw head was designed by a Canadian named Robertson somewhere in the 1950's. Four sizes matched to a colour. Smallest being yellow, then green, red and black. Never got popular in the States but they really work well, stay on the end of your driver bit and don't strip easily.
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#4 |
Member
Join Date: Dec 2012
Posts: 227
Likes: 4
Liked 162 Times in 45 Posts
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We saw a lot of them in the marine industry in late 50s and the sixtys. Good fastener, lots better than a phillips. Still see them a lot in the electrical industry.
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#5 | |
VIP Member
Join Date: Apr 2003
Location: Tulsa, Oklahoma
Posts: 1,675
Likes: 3,876
Liked 805 Times in 341 Posts
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Thanks, Bill |
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#6 |
VIP Member
Join Date: Jun 2006
Posts: 3,422
Likes: 532
Liked 333 Times in 180 Posts
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McMaster Carr sells them they are listed as PAN HEAD SQUARE DRIVE screws ---lots of diameters and lengths as well as material zinc coated/stainless steel etc. to choose from--- come in pkgs of 100---FED 387
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