Author Topic: floor board screws and u nuts  (Read 7374 times)

steve-0

  • Administrator
  • Hero Member
  • *****
  • Posts: 1380
floor board screws and u nuts
« on: November 20, 2011, 07:00:50 PM »
i haven't tried these, let me know if you have better sources

 screw size is #14 by 3/4" long
the original u nuts had a throat depth of 1" from center of the hole.
the longest needed is 3/4" with most of the holes being around 1/2" from the edge.
here are some options

screw part number 90054A313
http://www.mcmaster.com/#catalog/117/3018/=f0tjg6

u nuts
this one doesn't list the throat depth
part number 74-3975
http://www.car-pak.com/Fasteners/c22/p3061/74-3975/product_info.html  


1/2" throat depth
part number Auveco # 13220
http://www.thecliplink.com/nuts-en/u-nuts/u-nut-6.3mm-14-screw-size-.7-1.5mm-range-50-per-box.html
http://dixied.com/store/product4176.html

5/8" throat depth on this one
part number #20000T
http://www.autobodysupplies.com/foldclips.htm
« Last Edit: November 20, 2011, 07:13:33 PM by steve-0 »

Outsider

  • Hero Member
  • *****
  • Posts: 702
Re: floor board screws and u nuts
« Reply #1 on: November 21, 2011, 05:10:12 PM »
Hi Steve, Actually the floor screws are 1/4" 14 pitch thread. They are very hard to find without having a washer formed into the head. I got lucky and found a place that had some of the original style a couple of years ago so I bought all of them they had, and haven't found any more since.

Steve
« Last Edit: November 21, 2011, 05:12:17 PM by Outsider »
Lots of green "junk" as my wife likes to call it.
Friends don't let friends buy Trailking Trailers!

steve-0

  • Administrator
  • Hero Member
  • *****
  • Posts: 1380
Re: floor board screws and u nuts
« Reply #2 on: November 21, 2011, 09:17:36 PM »
thanks outsider
the original u-nuts i have are marked 14z. i compared original screws to some #14 screws at the local hardware store and they looked like a match but i didn't actually try them so i will do that and adjust the post. i also haven't been able to find them without the washered head.

it was hard to find u-nuts with a deep throat. try looking up "deep throat nut " on google  ;D

here are some 1/4" 14 threads per inch but they have that washer.
part number 93880A313   
http://www.mcmaster.com/93880A313   
« Last Edit: November 21, 2011, 09:26:27 PM by steve-0 »

Outsider

  • Hero Member
  • *****
  • Posts: 702
Re: floor board screws and u nuts
« Reply #3 on: November 22, 2011, 05:13:56 AM »
Here are some pictures of an original floor screw and the ones I found.



I have a box of the ones from McMaster Carr if someone wants them I will sell them cheap!

Steve
Lots of green "junk" as my wife likes to call it.
Friends don't let friends buy Trailking Trailers!

Outsider

  • Hero Member
  • *****
  • Posts: 702
Re: floor board screws and u nuts
« Reply #4 on: February 26, 2012, 08:49:24 PM »
Here is a picture of the screws from Mcmaster-Carr. I bought 100 of these before I found the ones I am using now. If anyone wants these from Mcmaster-Carr I will sell them cheap! $10.00 for what I believe is still 100 of them plus shipping.



Steve
Lots of green "junk" as my wife likes to call it.
Friends don't let friends buy Trailking Trailers!

steve-0

  • Administrator
  • Hero Member
  • *****
  • Posts: 1380
Re: floor board screws and u nuts
« Reply #5 on: June 17, 2012, 01:23:05 PM »
here are some unwashered screws.
these don't have the screwdriver slot but some of the originals did not have the slot.

1/4" x 14 threads per inch  3/4" long
http://www.imperialsupplies.com/item/0664102

http://www.fastenal.com/web/products/detail.ex?sku=0139489

#14 x 1" long screw
i think #14 and 1/4" screws are close enough to be interchangeable but i still need to verify this.
here is a no washer screw with the slot in size #14    1" inch long. after trimming the tip of the screw with your sander you will be perty close to the 3/4" originals.

http://www.titanfasteners.com/detail.aspx?item=FNA04032UNSL&id=334


here is one in stainless . they dont show the head style so i dont know if it has the indented head. no slot though.
manufacturer Elco part #HFTH600
you have to order 2500 of them on this link

http://hurripanel.com/-strse-924/Topseal-Stainless-Steel-Type/Detail.bok
« Last Edit: June 17, 2012, 02:34:07 PM by steve-0 »

steve-0

  • Administrator
  • Hero Member
  • *****
  • Posts: 1380
Re: floor board screws and u nuts
« Reply #6 on: March 22, 2014, 11:02:01 PM »

Chrishig

  • Newbie
  • *
  • Posts: 15
  • 978-618-9464
Re: floor board screws and u nuts
« Reply #7 on: November 28, 2018, 05:21:34 PM »
I found a good replacement for u nuts. I run a Polaris dealership and found them in my parts bins.  The Polaris part number is 7670145 and can be sourced at any Polaris dealer.
M3 in pieces
M2 in pieces
M15A1 becoming an M3
M38
GPW
M923A2

8683jb

  • Hero Member
  • *****
  • Posts: 662
Re: floor board screws and u nuts
« Reply #8 on: November 28, 2018, 09:24:46 PM »
Those look perfect Chris. Thanks for the tip.

Jon
'42 Autocar M2A1

MVPA member

Torque

  • Full Member
  • ***
  • Posts: 204
Re: floor board screws and u nuts
« Reply #9 on: February 03, 2020, 09:51:55 PM »
Anyone try these Polaris U nuts? The best price I can find is $2.34 each. http://www.adeptpowersports.com/oem-parts/polaris-nut-u-type-7670145-part.html
 
 Also looking for screws that will work. The pointy sheet metal #14 screws seem to have a smaller shank diameter and are about 9 threads per inch, that allows the screw to slip through the clip. Thinking these may be OK https://www.mcmaster.com/93880A313

 I don't care they are not exact style, I got way more obvious flaws.....

Outsider

  • Hero Member
  • *****
  • Posts: 702
Re: floor board screws and u nuts
« Reply #10 on: February 04, 2020, 05:50:14 AM »
Correct screw size and pitch is 1/4" x 14 threads per inch.

Steve
Lots of green "junk" as my wife likes to call it.
Friends don't let friends buy Trailking Trailers!

Scout6734

  • Newbie
  • *
  • Posts: 5
Re: floor board screws and u nuts
« Reply #11 on: February 04, 2020, 08:29:48 AM »
Since the 1/4-14 correct looking screws are basically unobtainable i opted for 1/4-20 as i only really cared what the head looks like.
 https://www.ebay.com/itm/STAINLESS-STEEL-SLOTTED-HEX-HEAD-MACHINE-SCREW-1-4-20-X-3-4-100-COUNT-NEW-BOX/233107789399?hash=item36464e9657:g:n-EAAOSwfqJcSfFw:sc:USPSPriority!19962!US!-1

Also the Polaris unuts are in 1/4-20 thread so they will work well.

An honestly since more than likely noones going to be crawling under critiquing our rigs standard unuts in 1/4-20 are very easy to find cheap in bulk other than 2-3.00 each. How many are even on the floors all together
« Last Edit: February 04, 2020, 08:31:49 AM by Scout6734 »