.I knew someone would go there......WW
is there such a thing as grade 8 nuts?
Thread Starter
Safety Car
Joined: Oct 2008
Posts: 4,022
Likes: 30
From: Los Angeles CA
I got a z51 rear spring, cause i like the way my old 85 z51 used to feel in the rear when cornering, after doing everything, z51 shocks, polys everyfreakin where, new ***** j's and s rack, 32's and 26's bars, it still felt"weak"
so to address this weakness, i am going the typical z51 rear rate, i hope it works, the front rate has gone up in my year car compared to the 85, and was matched up with other front rates, so I surmise the real issue is the rear....
I could leave the height alone, but after getting the 295x18 c5 zo6 rims combo 265x17, the rear relative to the front is too jacked up, so I want to drop it a little as much as i am against "lowering"
so to address this weakness, i am going the typical z51 rear rate, i hope it works, the front rate has gone up in my year car compared to the 85, and was matched up with other front rates, so I surmise the real issue is the rear....
I could leave the height alone, but after getting the 295x18 c5 zo6 rims combo 265x17, the rear relative to the front is too jacked up, so I want to drop it a little as much as i am against "lowering"
Drifting
Joined: Dec 2007
Posts: 1,647
Likes: 4
From: Argillite KY
Burning Brakes
Joined: Mar 2008
Posts: 881
Likes: 24
From: Coquitlam BC
Of course Grade 8 nuts exist... What would be the point of having a Grade 8 fastener if you couldn't secure it with the equivalent nut? Grade 8 fasteners (bolts) have 6 radial lines on the head surface and the corresponding Grade 8 nuts used to have (prior to July 1999) six curved lines on their face. After July 1999 it seems that SAE switched the markings on the nuts to 2 curved lines and a dot. (Not sure why the switch, but there you go.)
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Race Director
Joined: Aug 2000
Posts: 11,470
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for standard hardware, there are grade classifications. as a rule of thumb, only use matching grade hardware. if mixing grades, the total assembly is only as strong as the weakest link, and ideally different grades shouldn't be mixed - torque itself as a locking mechanism may be compromised. personally, i would never use a grade 8 bolt with a grade 3 nut.
Le Mans Master
Joined: Jul 2007
Posts: 5,043
Likes: 8
From: Tampa Florida
There is tons of counterfit hardware out on today's market....there is are also tons and tons of differnet legit nut/bolt grade markings. Buy your "graded" hardware from a reputable source and you should be OK.
Generic basic Nut & Bolt Grading chart:
http://www.americanfastener.com/tech...ings_steel.asp
Oh yes "washers" can be graded as well.
Last edited by engle1147; Dec 20, 2011 at 12:44 PM.
