Aftermarket Rims

Farmall Super A, AV, 100, 130, & 140 1939 - 1973
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Jim Becker
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Re: Aftermarket Rims

Postby Jim Becker » Wed Aug 24, 2022 4:54 pm

Looks metric to me.

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Re: Aftermarket Rims

Postby tst » Wed Aug 24, 2022 7:53 pm

those are metric bolts

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Re: Aftermarket Rims

Postby Slim140 » Thu Aug 25, 2022 6:12 am

Jim Becker wrote:Looks metric to me.

You would think so with the 8.8 but I just checked them with a screw pitch gauge and they are 18 TPI.

M16-1.5 is the closest thing to 5/8-18 and an M16 nut won't go on them.

I don't know why they are the way they are.
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Re: Aftermarket Rims

Postby Jim Becker » Thu Aug 25, 2022 12:52 pm

Strange.

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Re: Aftermarket Rims

Postby Gary Dotson » Thu Aug 25, 2022 6:51 pm

There are 4 different pitch’s for 16mm metric fasteners, it could be easily confused. I’m not close to metric tap and die set but I have all 4 in my set. I’ll see how lose they are.

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Re: Aftermarket Rims

Postby tst » Thu Aug 25, 2022 7:54 pm

never saw a USA threaded bolt marked with 8.8

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Slim140
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Re: Aftermarket Rims

Postby Slim140 » Fri Aug 26, 2022 6:41 am

I don't know if it's made this way on purpose or not, could have been threaded wrong, I don't know. I have 4 of them and they are all the same.

The black tap is 5/8-18, the gold tap is M16-1.5, the 16mm tap will not go in the nut. The die is 5/8-18.

16mm is .62992, 5/8" is .625. While .004" may not seem like a lot, it is.
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Re: Aftermarket Rims

Postby indy61 » Fri Aug 26, 2022 8:04 am

My guess is it's a UNF (USA thread) bolt made in a foreign country. 8.8 is equivalent to a grade 5 fastener.

https://www.fusionfixings.co.uk/nuts-bo ... -grade-8-8

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Re: Aftermarket Rims

Postby Slim140 » Fri Aug 26, 2022 8:34 am

indy61 wrote:My guess is it's a UNF (USA thread) bolt made in a foreign country. 8.8 is equivalent to a grade 5 fastener.

https://www.fusionfixings.co.uk/nuts-bo ... -grade-8-8

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