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Joined: Apr 2013
Posts: 250
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Apr 2013
Posts: 250 |
Hello everyone.
After inspecting the general condition of all the castellated nuts/bolts and cotter pins that attach the lower control arms (lower wishbone)to the front crossmember brace, I've decided to replace all of them. These drilled bolts are 7/16" with fine threads (about 20 count per inch), 1 1/2 inch long and threaded only half way leaving an unthreaded portion where it goes through the front crossmember brace.
I can not find these where I live. Does anyone know where you can get these original type fasteners? Chevs of the 40s and The Filling Station do not have these. I don't want to have to cut to proper length 8 grade 8 bolts and drill holes and etc.. Also, I really don't want to use regular bolts with lock washers. I guess there's a reason they did not use those back in 1940.
If it is impossible to get these particular bolts, what do you guys recommend?
Thanks for your help!
Curt
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Joined: Apr 2008
Posts: 1,194
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: Apr 2008
Posts: 1,194 |
Check out these guys. www.mcmaster.com
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Joined: Mar 2009
Posts: 885
ChatMaster - 750
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ChatMaster - 750
Joined: Mar 2009
Posts: 885 |
If you have a Fastenal Store near you, try them. I just bought the 15 head bolts for my 31 from them. Grade 8 and it cost just a touch over 25.00.
Jim.
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Joined: Apr 2013
Posts: 250
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Apr 2013
Posts: 250 |
Hello Jim,
Found a Fastenal store and got what I needed (sort of). Had to go an extra 1/4 in long and bolt end was not drilled. I'll just use lock washers since I can't use the cotter pin method.
Thanks,
Curt
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Joined: Mar 2009
Posts: 885
ChatMaster - 750
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ChatMaster - 750
Joined: Mar 2009
Posts: 885 |
Curt,
Glad to hear it worked out for you. Best to you in your endeavor.
Jim.
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Joined: Aug 2009
Posts: 254
Backyard Mechanic
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Backyard Mechanic
Joined: Aug 2009
Posts: 254 |
Just a nickel's worth of free advice based on general knowledge without knowing a thing about your wishbone. Castellated nuts with cotter pins are often used in situations where cinching the nut is unacceptable. A free working wishbone would seem to fall into that category, cinch the wishbone to the frame and it by definition won't be free working. I have never had much of a problem drilling bolts, it takes patience, but if I can do it, anyone can. I may be way off base here, please take it for what it's worth, but I would put in the extra effort.
1937 Master DeLuxe Business Coupe
1954 3100 5-Window
1954 Corvette
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Joined: Aug 2002
Posts: 410
Backyard Mechanic
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Backyard Mechanic
Joined: Aug 2002
Posts: 410 |
Lock washers and Red Loctite should do it.
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