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Old 03/05/2014, 04:10 AM   #1
murf104
 

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Rubber hood bumper "jam" nut

Seeking information or better yet an image of the "jam" nut on the stud of the rubber bumper that the front of the hood rests upon. On our C.S cars the front fender bolt was replaced with a hood stop which was locked in place with this nut. The standard "half" nut that was used on these rubber bumper studs is too small to span the opening in the fender and I suspect that a flange nut was used on the C. S. production but am not certain. Any information and images are appreciated, along with a notation of the finish on whatever kind of jam nut is used on our California Specials. Thanks in advance!
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Old 03/06/2014, 01:12 AM   #2
dalorzo_f
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Ref I have calls out

33922-S2 - Hex Nut - Jam (half height of regular Hex) 5/16-18 .180/.195 thk, 7/16" hex S2 = Phosphate and oil

Under that 44724 - Flat Washer -Standard - 5/16" .365/.385" ID, .875" OD, .064/.104 thk, no finish called out...
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Old 03/06/2014, 04:05 AM   #3
murf104
 

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Richard, where in the world did you find that info? And secondly, what was used on your car? I have a flat washer on one side and a flange nut on the other and either or both look as if they may have been added at some time. I looked all over for a Ford drawing of what we should expect to see on a CS with no luck. Thanks for the help. I am curious what others find on their CS.
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Old 03/07/2014, 04:01 AM   #4
dalorzo_f
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The part numbers are on a pic in the GTCS book, and I have a separate copy of the same Ford sketch from somewhere... "the reference library"! The details are from the AMK Guide to Ford Fasteners (a great reference and highly recommended for the restorer, in combination with the FAM's)

My car had been repainted and one fender replaced and to be honest I did not take a pic of that detail before it came apart. And it is still not back together...
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Old 03/07/2014, 06:38 AM   #5
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Quote:
Originally Posted by dalorzo_f View Post
Ref I have calls out

33922-S2 - Hex Nut - Jam (half height of regular Hex) 5/16-18 .180/.195 thk, 7/16" hex S2 = Phosphate and oil

Under that 44724 - Flat Washer -Standard - 5/16" .365/.385" ID, .875" OD, .064/.104 thk, no finish called out...
I am reasonably sure that it was not a 7/16 nut. Ever one that I have ever seen are 1/2 which is the standard size for a 5/16 - 18 bolt. The only place on the car that I know of a 7/16 nut on a 5/16 bolt are the carb studs. I will have to have a look at that book Richard.

Follow HCS restoration at http://68hcs.weebly.com
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Old 03/07/2014, 07:27 AM   #6
murf104
 

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Looking as this is written at Paul Newitt's lastest publication. Page 35 bottom of the page under "HOOD PINS" and taken from the Ford "District Special Order (DSO) Delete-Add List". As follows ""44724-S2 - 2 each, Flat Washer - 5/16 (Att. Hood Bumper (16763) to Fender flange)"" > I think this means that the standard hood bumper found on every 68 Mustang was moved from the welded bracket on the core support to a location normally occupied by the front fender bolt, and in order to retain the fender flange a flat washer was added under the jam nut. NOW, for the 7/16 half nut - would someone with unmolested front fenders check on the size of the jam nut and report if it takes a 7/16 wrench or a 1/2 " wrench. I think that a standard 68 Mustang would also provide this information. Also what finish do you find on the nuts, washer and stud.
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Old 03/07/2014, 10:11 AM   #7
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My GT/CS came with some parts which the PO had replaced. I just checked the hood bumper nut that he had removed. The nut is a 1/2 inch and has "S" and what looks like "181" stamped into it. He had replaced both bumpers and nuts and I have to assume that they are the originals as the car has 50,000 mile on it.

Steve Cracknell
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Old 03/07/2014, 09:50 PM   #8
dalorzo_f
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Rechecked the AMK Guide, misread the wrong line, it is a 1/2".

And yes, the standard bumper was just relocated, the washer added to cover the larger hole in the fender than there would have been for the stock location on the raditaor support.
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