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10-23-2006, 07:41 PM
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CC Member
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Join Date: Jul 2005
Posts: 419
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Not Ranked
Nuts and bolts
I'm just wondering what everybody does with their nuts and bolts? If you use black anodized bolts, they rust. Galvanized looks stupid with a dark frame, and paint chips off.
I've been powder coating most of the bolts, but this is horrendously time consuming. What does everybody do?
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10-23-2006, 10:14 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
Nothing. Use ARP black oxide, or their stainless in non critical applications, or to reduce expense, plated grade 5 or 8.
Side note:
Various authorities advise against using Grade 8 bolts in a shear applications, because they are very brittle and can fracture before deforming.
Consider bolts in critical applications such as suspension mounts and pivots and some steering components as maintainence items and replace them on a regular schedule. They have an anticipated life expectancy.
At the Nor Cal Mini Nats last month, a rear lower suspension link pivot bolt fractured on Gordon Gimbels Lotus/Ford allowing a huge toe change in the LR tire at about 80 MPH. Fortunately the driver was able to keep it off the wall, without a lot of damage, but it could have been disasterous.
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
Last edited by Rick Parker; 10-23-2006 at 10:27 PM..
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10-23-2006, 10:36 PM
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Club Cobra Member
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Join Date: Feb 2003
Location: Sterling,
IL
Cobra Make, Engine: SPF #1507 427 Dart Block Windsor
Posts: 1,192
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Not Ranked
www.mscdirect.com has a good selection of stainless and black SAE and metric fasteners and their service is second to none. A light glass bead blasting at 50-60 psi will give stainless bolts a soft, gray finish.
Lowell
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10-25-2006, 02:03 PM
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CC Member
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Join Date: Jun 2000
Location: Cape Town, South Africa/Mainz, Germany,
Posts: 1,601
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Not Ranked
hi rick,
grade 8 is that about 12.9?
then I agree.
use 10.9 for suspension parts.
dom
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If I don't respond anymore, that's because I can't log in
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10-25-2006, 03:04 PM
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CC Member
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Join Date: Mar 2001
Location: Cinnaminson,
NJ
Cobra Make, Engine: Cobra Fibercraft Bodies 427 S/C, 351W disguised as a 427.
Posts: 391
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Not Ranked
I totally agree with Rick Parker. When I first built my roadster I used grade 8 1/2" bolts to secure the trailing arms of the rear suspension. I broke the upper front bolts twice and finally decided to use a grade 5 bolt because the grade 8s were so brittle. Three years later and I haven't broken a single grade 5 bolt. There is a world of difference between clamping power and shear strength. The higher the bolt grade, the higher the clamping strength but also the lower the shear strength.
__________________
Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."
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10-25-2006, 03:14 PM
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CC Member
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Join Date: Jan 2002
Location: Northern California,
CA
Cobra Make, Engine: -Sold- Contemporary 427S/C # CCX-3152 1966 427 Med Rise Side Oiler, 8v 3.54:1 Salisbury IRS, Koni's.. (Now I'm riding Harleys)
Posts: 2,567
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Not Ranked
ARP 12 point stainless are really cool.
__________________
michael
A man that is young in years, may be old in hours, if he have lost no time. But that happeneth rarely. Generally, youth is like the first cogitations, not so wise as the second. For there is a youth in thoughts, as well as in ages... Sir Francis Bacon (1561-1626)
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10-25-2006, 08:05 PM
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CC Member
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Join Date: May 2003
Location: Hudson Valley NY,
NY
Cobra Make, Engine: Backdraft, 302, Tremec 3550. #038
Posts: 863
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Not Ranked
If grade 5 and 8 are to SAE, what is it for metrics?
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Kids in the backseats cause accidents, accidents in the backseat causes kids ! Good reason to get a Cobra !!!
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