Metric vs SAE


Flyer58

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Wiki: Standard sizes of square drives around the world include 1⁄4, 3⁄8, 1⁄2, 3⁄4, 1, 1 1⁄2, 2 1⁄2 and 3 1⁄2-inch square drive sizes (a de facto international standard with no metric equivalents

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Flyer58

Flyer58

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SAE pisses me off more than anything. I wish we'd just adopt the damn metric system.
I just wish Jeep had made a decision back in 92 and stuck with it. My intake manifold has 8 fittings or bolts on it and it's an even mix of metric or sae. Probably depended on where the parts came from.
 

Chris

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I just wish Jeep had made a decision back in 92 and stuck with it. My intake manifold has 8 fittings or bolts on it and it's an even mix of metric or sae. Probably depended on where the parts came from.

Yep, all my Jeeps (and I've owned a lot of them) have always been the same way. A mixture of metric and SAE bullshit, stupid torx bit fasteners, etc.

I'm sure you know how annoying it is having to switch from metric to SAE and then back again.
 
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Flyer58

Flyer58

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Yeah those Torx and even reverse Torx on the starter surprised me. Maybe a Canadian influence from the Robertson square head screws.

Here's an interesting article about how the Philips head screws took over in the auto industry.

 

Gilaguy23

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Be glad were not wrenching on vintage Rovers.
The success if the British Industrial Revolution. In total he (Sir John Wentworth)
developed no less than four separate ranges of thread: British Standard
Fine (BSF) British Standard Whitworth (BSW) British Standard Pipe (BSP) with
a sister thread in that same bracket called (BSPT) The tapered version for
high pressure use.
 

jeepjoe43

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Be glad were not wrenching on vintage Rovers.
The success if the British Industrial Revolution. In total he (Sir John Wentworth)
developed no less than four separate ranges of thread: British Standard
Fine (BSF) British Standard Whitworth (BSW) British Standard Pipe (BSP) with
a sister thread in that same bracket called (BSPT) The tapered version for
high pressure use.
Oh. man you are right!
Had friend in high school with a triumph trident, he couldn't find bolts for it anywhere.

And then there's the Prince of Darkness, Lucas Electric.
 

Bucky

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My 89 built in Canada has a metric oil filter. I never had an issue getting them until recently. I purchased some new Frams with the same part number as the old one and they did not fit. I finally found the correct WIx filters and stocked up on them.
 

Bucky

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Be glad were not wrenching on vintage Rovers.
The success if the British Industrial Revolution. In total he (Sir John Wentworth)
developed no less than four separate ranges of thread: British Standard
Fine (BSF) British Standard Whitworth (BSW) British Standard Pipe (BSP) with
a sister thread in that same bracket called (BSPT) The tapered version for
high pressure use.
Aren't the lug nuts right hand thread on one side and left on the other side also?
 
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jeepjoe43

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Aren't the lug nuts right hand thread on one side and left on the other side also?
I know the old Dodges used to be.
But, why??? So you can break off a stud on the side of the road if you don't know any better?
Always thought that was non-sense for anything but a spinner, if the lugs are coming loose it's because of improper torque..
But if the Brits did it too, it wouldn't surprise me, color me unimpressed.