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Old 10-08-2017, 08:10 PM   #29
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Old 10-08-2017, 08:30 PM   #30
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Originally Posted by Spk64 View Post
I am guessing it is a double square screw. They are pretty common in trailers. A standard square bit will work, but there are bits that will engage all points.
Attachment 179224

Oops, I see someone else also suggested the double square.
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Originally Posted by Cacique View Post
Spk64 and Cacique...........thanks very much. Yeah, the thread got a little long and windy as I wasn't getting the fact that a square bit was the proper bit for an 8 sided screw.

If someone has a link to a double square bit kit of multiple sizes, I'll order those, too, just to add to my tool kit. I'm not seeing any on Amazon (only one size, would have to get lucky with a fit) or the Home Depot site.
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Old 10-08-2017, 09:10 PM   #31
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Double Square...not only Fleetwood.
https://en.m.wikipedia.org/wiki/List_of_screw_drives

Makers use them because the driver will hold the screw during install (1 handed) and not strip.

A square (Robertson) driver might work, but not if the threads are seized.
A Torx (is 6 point) might hold, but not tightly.

For a full set of drivers (including double square) see Harbor Freight for a wide selection at a reasonable price:
Like, https://www.harborfreight.com/100-Pc...ase-68457.html
And others.

Best luck
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Old 10-08-2017, 09:20 PM   #32
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Originally Posted by Scarab0088 View Post
Double Square...not only Fleetwood.
https://en.m.wikipedia.org/wiki/List_of_screw_drives

Makers use them because the driver will hold the screw during install (1 handed) and not strip.

A square (Robertson) driver might work, but not if the threads are seized.
A Torx (is 6 point) might hold, but not tightly.

For a full set of drivers (including double square) see Harbor Freight for a wide selection at a reasonable price:
Like, https://www.harborfreight.com/100-Pc...ase-68457.html
And others.

Best luck

Oooohhhh......Thanks for that. That kit looks like it has 4 square bits in the upper left corner AND the 8 point in the lower left corner.

I've really starting to love Harbor Freight as a RV owner.
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Old 10-08-2017, 09:33 PM   #33
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Originally Posted by ualdriver View Post
Oooohhhh......Thanks for that. That kit looks like it has 4 square bits in the upper left corner AND the 8 point in the lower left corner.

I've really starting to love Harbor Freight as a RV owner.
OH YEA! Love Harbor Freight!
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Old 10-09-2017, 08:09 PM   #34
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Quote:
Originally Posted by ualdriver View Post
And why these weird screwheads anyway? My furnace access panel has a 4 sided, square screwhead. Why not just throw a phillips in there and call it done? Does Fleetwood just want to screw with us? (no pun intended )
Square drives work better with automated assembly - less chance of damaging the head.
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Old 10-10-2017, 10:41 AM   #35
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It's a double square (Robertson), though it looks to be already damaged. You don't need anything other than a standard #1 or #2 Robertson square bit. It's basically two square holes offset 45 degrees, so that the driver bit can be aligned and inserted more easily.

Rev Group [Fleetwood, Amerciacn, etc) uses square drive bits on their assembly line and the double-square heads save a half-second per screw in getting the bit into the hole.

They use square rather than Philips or Slot because they take can handle more torque without "cam out" or stripping the head. Torq would do the same, but they didn't choose that style.
https://en.wikipedia.org/wiki/Cam_out
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Old 10-10-2017, 07:34 PM   #36
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Originally Posted by Gary RVRoamer View Post
It's a double square (Robertson), though it looks to be already damaged. You don't need anything other than a standard #1 or #2 Robertson square bit. It's basically two square holes offset 45 degrees, so that the driver bit can be aligned and inserted more easily.

Rev Group [Fleetwood, Amerciacn, etc) uses square drive bits on their assembly line and the double-square heads save a half-second per screw in getting the bit into the hole.

They use square rather than Philips or Slot because they take can handle more torque without "cam out" or stripping the head. Torq would do the same, but they didn't choose that style.
https://en.wikipedia.org/wiki/Cam_out
Thanks Gary.

I thought all those screws were only on a few access doors, but upon further inspection today, I found that these types of screws were all over the basement areas of my RV.

I finally found some square bits that worked, too : )
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Old 10-10-2017, 10:36 PM   #37
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Quote:
Originally Posted by ualdriver View Post
Thanks Gary.

I thought all those screws were only on a few access doors, but upon further inspection today, I found that these types of screws were all over the basement areas of my RV.

I finally found some square bits that worked, too : )
Oh yea, these odd head screws are all over modern RV's.

Do tell...where did you get your bits?
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Old 10-10-2017, 10:40 PM   #38
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Oh yea, these odd head screws are all over modern RV's.

Do tell...where did you get your bits?
He-he well.......

I dug a little deeper into my tools this afternoon and found a seldom used screwdriver set with 3 of those little square bits among the 30 other bits the set came with. One of them fit : )
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Old 10-10-2017, 11:02 PM   #39
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Very nice

My first Robertson driver was part of a Craftsman 6 piece screwdriver set...never knew what it was for nor used it until the RV.

Safe travels
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Old 10-13-2017, 01:07 PM   #40
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I do woodworking and cabinetry as a hobby and have used square drive screws and bits for years. Many companies that build manufactured (aka mobile) homes use them, as well as companies that build furniture, sheds, and such.

The bits are easy to come by - most any hardware store or lumber yard or fastener supply store has them. And most bit assortments will have at east a #2 Square (Roberston) bit includes, and often the #1 & #3 as well..
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Old 10-13-2017, 10:19 PM   #41
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Originally Posted by Gary RVRoamer View Post
I do woodworking and cabinetry as a hobby and have used square drive screws and bits for years. Many companies that build manufactured (aka mobile) homes use them, as well as companies that build furniture, sheds, and such.

The bits are easy to come by - most any hardware store or lumber yard or fastener supply store has them. And most bit assortments will have at east a #2 Square (Roberston) bit includes, and often the #1 & #3 as well..
Now I know what to ask Santa for Christmas : )
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