Author Topic: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614  (Read 7154 times)


luv2sixty9

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #1 on: February 24, 2018, 03:08:38 PM »
No, its also the incorrect head marking.
1967 Z/28 Butternut Yellow
1969 Z/28 Rally Green
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1969 RS Z/28 Olympic Gold
1969 RS SS Pace Car
2010 Aqua Blue 2SS RS

Danzo

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #2 on: February 24, 2018, 06:58:49 PM »
Thanks for the reply. What would the correct finish and head marking be?
Thanks.

WorkinProgress

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #3 on: February 24, 2018, 07:48:07 PM »
The nut is the correct finish.

                - Warren

z28z11

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #4 on: February 25, 2018, 04:02:36 AM »
Here's an original - as far as I can tell, it was a phosphate finish (no evidence of cad or zinc iridite), either plain steel or phosphated nut and washers. Bolt is 1/2-20, 4-13/16 length under the head. Only marking I can see (sorry for the rough finish) after beading is an "L", which I highlighted best I could for the pic. I have both sides, they are identical markings and specs.

Hope this helps -

Regards,
Steve
1968 Z28 M21/U17 BRG/W 1967 Chevy ll Nova SS 
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06  1949 3100 5wd 235/6

Edgemontvillage

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #5 on: October 09, 2019, 02:33:18 AM »
After reviewing this thread a conclusion would be the spring cup eye bolt, washers (2) and nut were all originally manganese phosphated for '69. I'd be interested in any other observations as only one CRG member provided a photo. The restoration parts suppliers sell this fastener in gold iridite or zinc. 

   
« Last Edit: October 09, 2019, 02:58:22 AM by Edgemontvillage »

169INDY

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #6 on: October 09, 2019, 03:45:25 AM »
1969 LOS 04C
Heavy undercoated the Nut appears brite Zinc under the nasty's.

Jim
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

69Z28-RS

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #7 on: October 09, 2019, 12:05:35 PM »
I checked mine last night, appears to be phosphated originally...
09C 69Z28-RS, 72 B 720 cowl console rosewood tint
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Pacecar

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #8 on: October 09, 2019, 02:39:34 PM »
Don't mean to hijack topic but what about the rear end U Bolt nuts ? The ones on the U bolts that mount the springs & shackles to the rear axle. What finish on those ?

169INDY

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #9 on: October 09, 2019, 06:01:11 PM »
Don't mean to hijack topic but what about the rear end U Bolt nuts ? The ones on the U bolts that mount the springs & shackles to the rear axle. What finish on those ?

Heavy-Duty Lock Nut, Grade C SAE (Fine) Thread - Nuts - Nuts - Fasteners & Hardware
Zinc plated, silver finish
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

Edgemontvillage

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #10 on: October 17, 2019, 02:49:06 PM »
Thanks for posting photos and other references. Seems to be inconclusive regarding the finish on the nut - phosphate or zinc? Jim you stated: "Heavy-Duty Lock Nut, Grade C SAE (Fine) Thread - Nuts - Nuts - Fasteners & Hardware Zinc plated, silver finish", where did you source this information?

169INDY

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #11 on: October 17, 2019, 03:35:09 PM »
The bolt & nut might be a UNC course thread vice Fine thread.
Zinc plated is what I found on my particular car during underbody restoration.
The rest is typical fastener jargon.
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

Edgemontvillage

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #12 on: October 18, 2019, 12:17:13 AM »
Thanks Jim, on re-read I now realize you were commenting on the finishes for the axle U bolts and nuts.

Edgemontvillage

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #13 on: October 21, 2019, 01:11:46 AM »
I just came across a photo of my former '69 10 10 RS/Z survivor that was taken by James G (firstgenaddict) about the time the car was found following almost 2 decades of storage. The photo could be clearer and the lighting is not great but it does appear the eye bolt's nut and washers were zinc plated. Another clue is the full surface rust present on the surrounding fasteners that are known to be phosphated


Edgemontvillage

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #14 on: October 21, 2019, 01:21:46 AM »
Another angle:


Edgemontvillage

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #15 on: October 24, 2019, 02:53:56 PM »
Surprisingly few posts on this question. I reached out to "JM" and he stated the bolt, washers and nut should all be manganese phosphate.

x66 714

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #16 on: October 24, 2019, 08:23:47 PM »
Mine would be a good one to look at but I had to use the nut, bolt, & forward spring hanger for the body cart to bolt to. It's at the body shop at the moment. That hdw was absolutely perfect on that car. I have to go there in the morning as they're painting the front clip. I will see if I can see the hdw when I'm there...Joe
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1968 Z/28 Corvette Bronze. Black Hounds Tooth. 02E Los Angeles born 3/13/1968 pnt OO. Purchased March 1976
1969 SS396 Yellow/Yellow 08E Norwood born 8/28/1969 pnt 76E. Purchased April 1981

Edgemontvillage

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #17 on: October 24, 2019, 09:49:20 PM »
Mine would be a good one to look at but I had to use the nut, bolt, & forward spring hanger for the body cart to bolt to. It's at the body shop at the moment. That hdw was absolutely perfect on that car. I have to go there in the morning as they're painting the front clip. I will see if I can see the hdw when I'm there...Joe

Thanks.

john302

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #18 on: October 26, 2019, 04:17:52 PM »
On all the original cars that I have seen the nut is silver and all other pieces are black/grey phosphate . Can supply photos to back this up.This is the way I have done it on all the restorations in the past. The nut is alittle thicker and square cut compared to a standard hardware store nut.

Edgemontvillage

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #19 on: October 27, 2019, 03:23:18 AM »
If you have any original photos of this hardware to post that would be helpful.

Edgemontvillage

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Re: 1969 rear leaf spring cup front eye bolt & nut part#3892754 & 9417614
« Reply #20 on: November 04, 2019, 03:00:17 PM »
For those who've contributed to this thread, thank you! From photos and other input I've received I've concluded the following:

Eye bolt, flat washer and lock washer - manganese phosphate (dark)
Nut - silver/clear zinc or natural


Here is the now restored hardware for my car:


« Last Edit: November 04, 2019, 03:41:56 PM by Edgemontvillage »