knuckle bolt Grade??
06-26-2009, 12:57 PM
#1
Racer
Thread Starter
C2 knuckle bolt Grade??- Urgent need answer tonight
I finally got my lower knuckle bolt and nut monunting kit from Dr rebuild for my c2. The new bolts have 3 slashes. As I am doing a frame off I am storing all the original hardware. I noticed the original bolts had 5 slashes with a w in the center. These are critical bolts as they hold the front knuckles and caliper brackets. Now maybe I changed those bolts many years ago to a higher grade and they are not the originals...Does anyone know if the 3 slashes is ok?? I do know the higher grade bolts can be brittle. Just want to make sure.
Last edited by newcastlegreg; 06-26-2009 at 05:49 PM. Reason: change
06-26-2009, 01:42 PM
#2
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2023 C1 of the Year Finalist - Modified
2015 C1 of the Year Finalist
3 lines-Grade 5
5 lines-Grade 8
Personally, I'd prefer Grade 8 bolts for this application.
Tom Parsons
5 lines-Grade 8
Personally, I'd prefer Grade 8 bolts for this application.
Tom Parsons
06-26-2009, 01:48 PM
#3
Racer
Thread Starter
Not sure
I know grade 8 is stronger but it could be more brittle on shear. I know I am being a granny on this. Just called paragon and they sell grade 8 for this application. Would feel most comfortable going with what they originally came with.
06-26-2009, 02:24 PM
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C2 of Year Finalist (track prepared) 2019
For critical applications, like holding on suspension or brake parts, the only bolt head logo I use reads "ARP".
Jim
06-26-2009, 05:43 PM
#5
Racer
Thread Starter
Need more input!!
I want to put my hubs on tonight-already have the dr rebuild 3 slash bolts on and torqued. Can anyone tell me what origonals are-I have my originals ready to go if they are the originals.
06-26-2009, 10:46 PM
#6
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I just did this yesterday on my 67. The bolts I took out were grade 8 with 5 lines and "M" headmark (probably the "W" yours have). I believe these to be correct, but had some damaged threads from being loose on the drivers side (yikes!).
I ordered all my replacement fasteners from Paragon based on experience (they have the highest winning percentage of sending quality and and correctness in my book). These fasteners are Grade 8 (6 lines) and marked "LE". They install with crimp nuts on the inside. Torque to 60-80 ft-lbs.
I ordered all my replacement fasteners from Paragon based on experience (they have the highest winning percentage of sending quality and and correctness in my book). These fasteners are Grade 8 (6 lines) and marked "LE". They install with crimp nuts on the inside. Torque to 60-80 ft-lbs.