upper control arm nuts
Thread Starter
Pro
Joined: Feb 2013
Posts: 572
Likes: 61
upper control arm nuts
Putting the front suspension back together. What I took off for fasteners seems to be mismatched/incorrect. I have two nuts one one side that are lock nuts and the other two on the other side were flanged type nuts with a locking serrated type of head. From searching it appears that the lock nuts are the correct type to use. I searched several hardware stores and they only carry the plain lock nuts in grade 5. I am looking for grade 8 but they only have the nylon type lock nuts in that grade. Is the grade 5 strong enough? Did the car have grade 8 from the factory? All of the searches that I have done for them online do not specify if they are grade 8.
Burning Brakes
Joined: May 2018
Posts: 797
Likes: 156
From: England AR
They need to be what is called "grade C locknuts" they work like nylocks but the are solid metal that have been pinched on the ends to squeeze the threads and can installed about a dozen times before they wear out
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
Seeing how none of us can see what you are talking about. How about posting photos of what it is you ahve and have them separated enough so we can tell you what is going on. IF you do take a photo and post it..please make sure it is a good photo with good lighting adn the photo is in focus.
YES...there ARE Grade 8 bolts in the front suspension...but NOT ALL of the bolts need to be Grade 8....which is why a photo would help us help you greatly.
DUB
YES...there ARE Grade 8 bolts in the front suspension...but NOT ALL of the bolts need to be Grade 8....which is why a photo would help us help you greatly.
DUB
Race Director
Joined: Apr 2007
Posts: 11,150
Likes: 890
From: South Western Ontario
That's the type of nut to use.If the hardware store has those and says they are grade 5 then they'd work fine. However, ask where the hardware comes from. If they don't know or can't name a large trustworthy North American supplier then I'd be a little concerned about them really being grade 5.
Tech Contributor
Joined: Aug 1999
Posts: 14,373
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From: At my Bar drinking and wrenching in Lafayette Colorado
Last edited by lars; Sep 19, 2018 at 01:11 PM.
Race Director
Joined: Nov 2006
Posts: 19,445
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From: Athens GA
St. Jude Donor '12-'13, '15- '16-'17-'18-'19, '21
You can get steel lock nuts equivalent to Grade 8 from McMaster:
https://www.mcmaster.com/locknuts
https://www.mcmaster.com/locknuts
Bingo!
First place I thought of when I saw the OP.
Great place for me....only one day away shipping.
