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Unread 08-30-2012, 11:28 AM   #46
weapon
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Interesting...

Can you post up the Size, Thickness, Height for both the bumper and the screw? Please.

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Unread 08-30-2012, 11:34 AM   #47
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Quote:
Originally Posted by weapon
Interesting...

Can you post up the Size, Thickness, Height for both the bumper and the screw? Please.
Will do! Should have them in a few days.
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Unread 08-30-2012, 11:48 AM   #48
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Sounds good.
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Unread 08-30-2012, 01:25 PM   #49
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Jeep did buy a lot of obsolete stuff from Ford. So it's entirely possible that our hoods use the same rubber bumper as a Model A
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Unread 09-01-2012, 08:19 PM   #50
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Quote:
Originally Posted by CousinCJ
Bought a set of these today...

http://pages.ebay.com/link/?nav=item...obalID=EBAY-US

Or search for "Ford Model A Rubber Hood Bumper Kit"
Just got them in.

Bumper is 7/8 wide across the bottom, 3/8 tall, and the well is 1/4 deep. Moulded inside the rubber is metal washer. You have to push the bolt through the bottom thin layer of rubber.

Bolt is 3/4 overall length with the head being 1/8 tall. The stem is 1/8 wide. The head is 1.25/4 wide. Nut matches bolt.

Washer is 1/2 wide total with the center being 1/4 wide.
image-436161469.jpg   image-722727660.jpg   image-3372663998.jpg   image-566343963.jpg  
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Unread 09-01-2012, 09:46 PM   #51
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You're likely to find that those are going to be too big in diameter and too thick. The grille overlay cross section is 3/4".

The original OEM bumper is 5/8" diameter, 1/4" tall, has a 0.190" diameter hole and uses a 10-32x5/8 Torx head screw that the original version was flat across the top although they referred to it as a pan head. This threaded into a rubber well-nut with brass insert that is 3/8" outer diameter and 0.4" tall with the brass insert having 10-32 threads.
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Unread 09-02-2012, 06:54 AM   #52
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Quote:
Originally Posted by weapon View Post
My oem screws were not pan heads but torx and yes it did seem to sit flush with the bumper. While it looks like I have misplaced the only complete OEM set I have left. I do have the screw (with no bumper) and a slightly damaged Well-Nut I can send you. Here are some more photos.
Those are actually called Low Head Torx Cap Screws and would be hard to find an exact replacement. Similar to the type used for holding the outside mirror brackets to the windshield hinges except those are 1/4-20 threads and very short.

McMaster-Carr has something close that you can get in stainless but are Allen Head and are not available in 5/8" length.




They also have a Pan Head Torx screw in stainless 10-32 thread and 5/8" length that is close to originals.

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Unread 09-02-2012, 07:41 AM   #53
BlkCJ7Laredo
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Keith,

I actually purchased those pan head Torx screws from McMaster-Carr and they are made by Camcar, who invented Torx. When putting them into the bumper the top of the head actually sits slightly above the bumper, so they'd hit the hood.

I also got another Torx screw from them as well, in Button Head, and those sit below the top of the bumper but are not stainless.
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Unread 09-10-2012, 03:08 PM   #54
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I got my set of bumpers. I totally see what you are talking about now. The 2 different bumper sizes seem fine (I wish I had a NOS to compare them to). The well nuts seems to be the same as the OEM YJ ones but are different than the OEM CJ (I will get a photo side by side comparison of all three).

I wish my OEM Low Head Torx Cap Screws were in salvageable condition. Since the torx screw rise over the bumper, it looks like the black ones are my only choice. Thanks for all the legwork on this.
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Unread 09-10-2012, 04:16 PM   #55
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The smaller bumper is identical in every dimension to the OEM J4006673. As far as the Well-Nuts are concerned, once you install the grille, it works like a Rivet. The brass nut pulls up and expands the rubber so that the grille can't pull out. That may be why you say the OEM from your grille look different. The YJ uses the same wellnut as the CJ J4005237 and that's from the old PDF 1981-86 parts manual.
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Unread 09-11-2012, 10:39 AM   #56
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My old well nuts must have been crushed and stretched from the 20+ years of use. The well nuts you provided are the exact same as the dealership. I wont know which bumper will work best until I put my front end back together. But from the looks I like the slightly larger one. It may be a bit harder close but seems to offer more surface area to distribute the hood.
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Unread 08-11-2013, 02:04 PM   #57
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Originally Posted by Dadamsnv View Post
Doesn't look the same, but may be what you are looking for

http://www.jeep4x4center.com/hood-gr...k-5455348.html
In case it might help anyone reading this thread in the future, the above link is for "Hood to Grille Grommet - 3/16" Thick" and features the pic below.

That appears to be identical or very close to McMaster Carr # 9309K23 which is $12.83 for 100 pieces.
jeep-hood-grill-grommet.png

jeep-hood-grill-grommet-mcmaster.png

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Unread 08-11-2013, 07:39 PM   #58
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Quote:
Originally Posted by Ken4444 View Post
In case it might help anyone reading this thread in the future, the above link is for "Hood to Grille Grommet - 3/16" Thick" and features the pic below.

That appears to be identical or very close to McMaster Carr # 9309K23 which is $12.83 for 100 pieces.
That won't work. The OEM bumper is 7/8" diameter, and the hole in the grille is 3/8" diameter, the "F" dimension of the factory bumper is 1/2" and that one pictured is 5/16" so it wouldn't even stay in the hole.
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