Lowering bolts
Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,990
Likes: 183
From: Port St. Lucie Fl
Lowering bolts
I need 10" bolts local Rural King,Fastenal, Menards, Tractor supply, OK fasterners, Superior Industrial, Ecklers all dont have the right size. Where did you get yours?
Le Mans Master
Joined: May 2003
Posts: 8,884
Likes: 3,561
From: Fernandina Beach FL
2023 Restomod of the Year finalist
2020 C3 of the Year Winner - Modified
VBP
C4 bolts
https://www.vbandp.com/auto-parts/c4...96-detail.html
before-
DSCN4110 by Richard Hayes, on Flickr
After-
DSCN4137 by Richard Hayes, on Flickr
C4 bolts
https://www.vbandp.com/auto-parts/c4...96-detail.html
before-
DSCN4110 by Richard Hayes, on FlickrAfter-
DSCN4137 by Richard Hayes, on Flickr
Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,990
Likes: 183
From: Port St. Lucie Fl
VBP
C4 bolts
https://www.vbandp.com/auto-parts/c4...96-detail.html
before-
DSCN4110 by Richard Hayes, on Flickr
After-
DSCN4137 by Richard Hayes, on Flickr
C4 bolts
https://www.vbandp.com/auto-parts/c4...96-detail.html
before-
DSCN4110 by Richard Hayes, on FlickrAfter-
DSCN4137 by Richard Hayes, on Flickr
Safety Car
Joined: Apr 2015
Posts: 4,892
Likes: 202
From: Jackson MS
Safety Car
Joined: Apr 2006
Posts: 4,057
Likes: 421
From: BC
Corvette Central has 8" bolts with nyloc nuts. I think that's a couple of inch drop from stock.
http://www.parts123.com/corvettecent...50g&ukey=26992
http://www.parts123.com/corvettecent...50g&ukey=26992
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Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,990
Likes: 183
From: Port St. Lucie Fl
Corvette Central has 8" bolts with nyloc nuts. I think that's a couple of inch drop from stock.
http://www.parts123.com/corvettecent...50g&ukey=26992
http://www.parts123.com/corvettecent...50g&ukey=26992
Safety Car
Joined: Apr 2015
Posts: 4,892
Likes: 202
From: Jackson MS
I ordered from the website...
I can't remember the diameter / thread pitch, but they are definitely available.
https://www.fastenal.com/products?r=...|sattr06:^8$|~
I can't remember the diameter / thread pitch, but they are definitely available.
https://www.fastenal.com/products?r=...|sattr06:^8$|~
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
Yep or buy run-flats. I would not use 10" bolts for this reason. I have 8" bolts which are at the limit should my tire go flat. 10" bolts would be a disaster I would think.
Race Director
Joined: May 2006
Posts: 18,782
Likes: 2,597
bolt diameter
https://www.corvetteforum.com/forums...bolt-size.html
Last edited by MelWff; Dec 31, 2016 at 12:08 PM.
Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,990
Likes: 183
From: Port St. Lucie Fl
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
FastenAll can special order some longer bolts, but they are rather costly. But, here's an alternative to special bolts (which the purists won't like) that is doable.
Go with the standard 9/16" bolts, but buy four of them [aprx. 5" long]. Also purchase four 9/16" thread jamb-nuts and two 9/16" full-threaded unions. Size the bolts as needed to get the ride height you want. On each side, install one bolt from the top, then install a jamb-nut and a union [engage the union least 9/16" on to the bolt]. Now, install the second bolt from the bottom and put a jamb-nut on it. You can get the equivalent of a 10" bolt with two 5" bolts connected with a union fitting with jamb-nuts to lock the bolts to the union solidly.
Once you have driven the car a while to let it all settle down, you can make minor adjustments in ride height [with the union position] to finalize the change. When satisfied with it, back off each jamb-nut and put a drop of high-strength Loctite on the threads to fix the jamb-nuts after tightening.
P.S. I don't believe the factory installed Grade 8 bolts in that location. If memory serves, they used Grade 5 fasteners there. Grade 8's are very strong but more brittle, and they will not have the 'toughness' of the Grade 5's . Just something to consider.
Go with the standard 9/16" bolts, but buy four of them [aprx. 5" long]. Also purchase four 9/16" thread jamb-nuts and two 9/16" full-threaded unions. Size the bolts as needed to get the ride height you want. On each side, install one bolt from the top, then install a jamb-nut and a union [engage the union least 9/16" on to the bolt]. Now, install the second bolt from the bottom and put a jamb-nut on it. You can get the equivalent of a 10" bolt with two 5" bolts connected with a union fitting with jamb-nuts to lock the bolts to the union solidly.
Once you have driven the car a while to let it all settle down, you can make minor adjustments in ride height [with the union position] to finalize the change. When satisfied with it, back off each jamb-nut and put a drop of high-strength Loctite on the threads to fix the jamb-nuts after tightening.
P.S. I don't believe the factory installed Grade 8 bolts in that location. If memory serves, they used Grade 5 fasteners there. Grade 8's are very strong but more brittle, and they will not have the 'toughness' of the Grade 5's . Just something to consider.
Last edited by 7T1vette; Dec 31, 2016 at 04:03 PM.
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
How much unneeded length will you have is the question. I have 8" bolts and less than an inch unneeded and would like to lower my rear even more which would require 10" bolts. I'm playing it safer and live with the extra inch or so of ride height.
Thread Starter
Drifting
Joined: Jun 2012
Posts: 1,990
Likes: 183
From: Port St. Lucie Fl
FastenAll can special order some longer bolts, but they are rather costly. But, here's an alternative to special bolts (which the purists won't like) that is doable.
Go with the standard 9/16" bolts, but buy four of them [aprx. 5" long]. Also purchase four 9/16" thread jamb-nuts and two 9/16" full-threaded unions. Size the bolts as needed to get the ride height you want. On each side, install one bolt from the top, then install a jamb-nut and a union [engage the union least 9/16" on to the bolt]. Now, install the second bolt from the bottom and put a jamb-nut on it. You can get the equivalent of a 10" bolt with two 5" bolts connected with a union fitting with jamb-nuts to lock the bolts to the union solidly.
Once you have driven the car a while to let it all settle down, you can make minor adjustments in ride height [with the union position] to finalize the change. When satisfied with it, back off each jamb-nut and put a drop of high-strength Loctite on the threads to fix the jamb-nuts after tightening.
P.S. I don't believe the factory installed Grade 8 bolts in that location. If memory serves, they used Grade 5 fasteners there. Grade 8's are very strong but more brittle, and they will not have the 'toughness' of the Grade 5's . Just something to consider.
Go with the standard 9/16" bolts, but buy four of them [aprx. 5" long]. Also purchase four 9/16" thread jamb-nuts and two 9/16" full-threaded unions. Size the bolts as needed to get the ride height you want. On each side, install one bolt from the top, then install a jamb-nut and a union [engage the union least 9/16" on to the bolt]. Now, install the second bolt from the bottom and put a jamb-nut on it. You can get the equivalent of a 10" bolt with two 5" bolts connected with a union fitting with jamb-nuts to lock the bolts to the union solidly.
Once you have driven the car a while to let it all settle down, you can make minor adjustments in ride height [with the union position] to finalize the change. When satisfied with it, back off each jamb-nut and put a drop of high-strength Loctite on the threads to fix the jamb-nuts after tightening.
P.S. I don't believe the factory installed Grade 8 bolts in that location. If memory serves, they used Grade 5 fasteners there. Grade 8's are very strong but more brittle, and they will not have the 'toughness' of the Grade 5's . Just something to consider.
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
I'm using 1/2" grade 8 bolts, each bolt is good for over 3000 lbs of weight x 2 that's 6000 # capacity, that's nearly twice what the car weighs, there's typically 1/2 of the cars weight on the rear. Safety factor of 4, I'm not worried!