Spec needed: stock rear spring bolt length
Thread Starter
Racer
Joined: Aug 2001
Posts: 478
Likes: 45
From: St. Louis
Spec needed: stock rear spring bolt length
Could anyone tell me the length of the stock rear spring bolts? Do the aftermarket lowering bolts typically have the drilled hole for the cotter pin like the stockers? How much shorter/longer are most lowering bolts, and how are they different?
I know you can just remove the cotter and crank the nut down on the stock bolts, but I don't want to do that for resons of safety. I'd appreciate any info. :)
I know you can just remove the cotter and crank the nut down on the stock bolts, but I don't want to do that for resons of safety. I'd appreciate any info. :)
Burning Brakes
Joined: Jan 2001
Posts: 1,169
Likes: 0
From: Manhattan
Re: Spec needed: stock rear spring bolt length (TomH91)
Stock hex head cap screws:
14mm(D) x 2.0 x 230mm(L) grade 9.8 (min tensile strength 130,500psi)
they are equivalent to SAE --
9/16" x 9" grade 6 (min tensile strength 133,000psi) or grade 8 (min tensile strength 150,000psi)
14mm(D) x 2.0 x 230mm(L) grade 9.8 (min tensile strength 130,500psi)
they are equivalent to SAE --
9/16" x 9" grade 6 (min tensile strength 133,000psi) or grade 8 (min tensile strength 150,000psi)
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Re: Spec needed: stock rear spring bolt length (Raistlin)
I knew once but forgot. I thought it was in the 8 to 10 inch range. If you lengthen one inch you get an inch of lowering and so on, is that correct?
Le Mans Master
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
Re: Spec needed: stock rear spring bolt length (Raistlin)
Stock hex head cap screws:
14mm(D) x 2.0 x 230mm(L) grade 9.8 (min tensile strength 130,500psi)
they are equivalent to SAE --
9/16" x 9" grade 6 (min tensile strength 133,000psi) or grade 8 (min tensile strength 150,000psi)
14mm(D) x 2.0 x 230mm(L) grade 9.8 (min tensile strength 130,500psi)
they are equivalent to SAE --
9/16" x 9" grade 6 (min tensile strength 133,000psi) or grade 8 (min tensile strength 150,000psi)
Burning Brakes
Joined: Jan 2001
Posts: 1,169
Likes: 0
From: Manhattan
Re: Spec needed: stock rear spring bolt length (Steel Blue 91)
Stock hex head cap screws:
14mm(D) x 2.0 x 230mm(L) grade 9.8 (min tensile strength 130,500psi)
they are equivalent to SAE --
9/16" x 9" grade 6 (min tensile strength 133,000psi) or grade 8 (min tensile strength 150,000psi)
I believe he's refering to the thread size and not the head size.
14mm(D) x 2.0 x 230mm(L) grade 9.8 (min tensile strength 130,500psi)
they are equivalent to SAE --
9/16" x 9" grade 6 (min tensile strength 133,000psi) or grade 8 (min tensile strength 150,000psi)
I believe he's refering to the thread size and not the head size.
stock bolts have a diameter of 14mm, length of 230mm and the thread pitch is 2.0
diameter is mearsured at the shank, not the head. i don't recall what diameter the head of the bolts are.
divide by 25.4 to get measurements in inches
[Modified by Raistlin, 8:30 PM 4/16/2004]
Team Owner
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Re: Spec needed: stock rear spring bolt length (TomH91)
The stock bolt from my 86 coupe is 9.25" overall, with the cotter pin hole at 8.25". The MAD Lowering bolt is 10.5"
-JRC-
-JRC-
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