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Old 01-20-2007, 10:40 AM
R Gassman

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31 chevy spindle threads per inch?

Does anyone out there know the thread pitch on a 31 Chevy front spindle? 3/4 X ? I need to get a die to chase the threads further up the spindle but am having trouble determining the threads per inch. regular 3/4 fine is still to coarse.



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Old 01-20-2007, 11:33 AM
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You can get one of those multi-leaf (looks like a feeler gauge) thread gauges from Snap-On, etc. for a few bucks. Handy to have. Not sure if they include non-standard thread counts, though.

You might be able to hold a machinist ruler next to it and count the threads per inch.

Quick hint for other times.
Lay another bolt of the same diameter, thread to thread, into the other for a match up.
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Old 01-20-2007, 08:46 PM
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I dont know what the thread count on a 31 chevy spindle is but here is a pic of that pitch gauge.

And X is right, use any bolt with the matching pitch to determine thread count. The thread depth is dependent on the pitch, not the diameter.

If you need a nonstandard die check enco or rutland. The new
Rutland catalog lists 3/4" dies in 10,14,16,18,20,27,28,32,36,40 and 48 TPI.

They look chinese, so buy 1 for each side.

You may want to check the threadform with a gauge to make sure it is really 60*.

Are you sure you cant use a spacer under the nut?

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Old 01-21-2007, 01:49 PM
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Those gages don't cost much, You can even get one at
Sears or at most autoparts stores. You will find that you dig it out quite often if you have it.

Suggestion, take the nut with you to the parts house or hardware store and see if you can match it up with what you need. you might try one of the bolt and nut dealers around as they often sell taps and dies along with the fasteners.

I wouldn't buy a joe cheap thread chaser or die as they often miss the mark when it comes to thread quality.
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