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What did you do with your Z today V (ON TOPIC DISCUSSION ONLY)

Originally Posted by BoneZ I'll get new ones. I see a 6 on the bolt head. Are these hardened? I know usually the hardened bolts have lines on them. Metric

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Old 01-20-2018, 09:03 AM   #1 (permalink)
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I'll get new ones. I see a 6 on the bolt head. Are these hardened? I know usually the hardened bolts have lines on them.
Metric fastener grading is a little different. 5.6, 8.8, etc. I'm not certain about this specific bolt, but I'd suspect it would be case hardened.

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Old 01-20-2018, 09:26 AM   #2 (permalink)
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Metric fastener grading is a little different. 5.6, 8.8, etc. I'm not certain about this specific bolt, but I'd suspect it would be case hardened.

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I got 8.8 and a tap.
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Old 01-20-2018, 10:11 AM   #3 (permalink)
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Originally Posted by MadSciSnails View Post
Metric fastener grading is a little different. 5.6, 8.8, etc. I'm not certain about this specific bolt, but I'd suspect it would be case hardened.

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It's not a metric bolt though. 1/2"-20
Edit: nm... you said metric grading.
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Old 01-20-2018, 11:15 AM   #4 (permalink)
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It's not a metric bolt though. 1/2"-20
Edit: nm... you said metric grading.
Well actually. The picth appears to be the same on these things, but the bolt itself is about half a millimeter wider. These aren't going to work.
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Old 01-20-2018, 02:35 PM   #5 (permalink)
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Well actually. The picth appears to be the same on these things, but the bolt itself is about half a millimeter wider. These aren't going to work.
I was thinking it's was a bit odd to have a standard fastener on a modern car. Particularly one of Asian origins.

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Old 01-20-2018, 02:53 PM   #6 (permalink)
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I was thinking it's was a bit odd to have a standard fastener on a modern car. Particularly one of Asian origins.

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Yeah, that was my thought as well. But apparently, an M12 1.25 bolt will thread intro a 1/2"-20 nut... just not the other way around.
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Old 01-22-2018, 08:01 AM   #7 (permalink)
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It's not a metric bolt though. 1/2"-20
Edit: nm... you said metric grading.
That should be a 12mm x either 1.25 or 1.50 thread pitch. The car is metric, so a 1/2" - 20 would be totally wrong.

See if some store has a thread pitch gauge and get one in metric & SAE. It will save accidentally destroying a bolt...
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Old 01-22-2018, 09:31 PM   #8 (permalink)
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That should be a 12mm x either 1.25 or 1.50 thread pitch. The car is metric, so a 1/2" - 20 would be totally wrong.

See if some store has a thread pitch gauge and get one in metric & SAE. It will save accidentally destroying a bolt...
It was M12 1.25... they all were. Bracket bolts, caliper pine, lug nuts. I got the right tap and die and chased every one of them. Car reassembled like buttah.
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