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Old 03-17-2015, 10:55 PM   #1
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Default Bolt identification help



Anyone know where this came from? Should be from a 90 miata.
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Old 03-18-2015, 11:41 AM   #2
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Looks like the nut and bolt for a subframe brace or the small bolt of the PPF

You find the nut to match, or were they paired?
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Old 03-18-2015, 02:53 PM   #3
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They were paired.

I did remove the PPF. I also removed the rear subframe.

Where on the PPF are you thinking it belongs?
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Old 03-18-2015, 03:19 PM   #4
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If it came with the nut, it's probably not the PPF; but there are two long bolts and a short bolt by the transmission.

They look similar to a cross brace on the rear subframe, but that might have a welded nut on the subframe itself.

Is the tip of the bolt tapered?
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Old 03-18-2015, 05:18 PM   #5
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What size is the head? Is it sitting in the top of a jack stand?

With a lock washer and washer could be axle or drive shaft.
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Old 03-18-2015, 05:46 PM   #6
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Quote:
Originally Posted by Miater View Post

With a lock washer and washer could be axle or drive shaft.
Drive shaft looks right to me.

--Ian
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Old 03-18-2015, 06:19 PM   #7
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Wow, I guess the picture looked a lot stubbier than I expected, but yea, bolt and nut are two different sizes, then I'd also vote driveshaft.
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Old 03-19-2015, 03:00 AM   #8
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Better pic. Both bolt head and nut are 14mm. All bolts from the differential to driveshaft are accounted for. Any other ideas?

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Old 03-19-2015, 08:03 AM   #9
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Is this a quiz? Will you tell us the answer if we cannot guess correctly?


#weightreduction
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Old 03-19-2015, 01:49 PM   #10
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Is it a regular nut, or an oval-shaped, "squished" mechanical locknut? If a locknut, then it looks like an exhaust manifold nut, and in that case I think the bolt and nut are unrelated to each other.

Now that I can see the pointed end it's definitely not a driveshaft bolt. Some of the subframe bolts are that shape, but they aren't 14mm, so I dunno.

--Ian
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