Decimal inches can lick my ass.

Fractional metric can wear a skirt and give me a reach around 😍

Are they really that small?

Yeah, honestly I'm usually so tired of the imperial VS metric debate (I know metric is better and I wish the US used it, it's just a low priority), but drill bit sizes are so stupid.

"Yeah gimme that 15/64ths bit" unhinged behavior.

You actually can't be mad about this one. This is effectively binary which you use all the time without knowing it. And even worse, proper SI notation has jacked up binary hardcore.

1, 1/2, 1/4, 1/8, 1/16, 1/32... You won't find a 1/12 or some other number.

10 isn't the best base and I'm sick of pretending it is.

Because a lot of imperial measurements revolved around being able to be divided by 4, and occasionally 3 at times.

For instance the cooking unit of measurments are in 4's or base 2 in a way (e.g 1 gallon = 4 quarts = 8 pints = 16 cups = 128 ounces)

We still see 4s or 3s irl regardless of measurement system. Doughnuts are often prepared in dozens and virtually never in 10s. Do we walk around claiming why bakers hate 10 step counting?

Time is the example of something designed around 3/4 and didn't change. 60 is divisiable by both 4 (15) and 3 (20) and is not base 10, but people can accept that.

Why do you people feel the need to be able to convert between the thickness of a human hair and the distance between cities?

Ah yes, this bolt is .000001 kilometers wide. That’s a very useful thing you guys did. Definitely need that in every day life.

Using 12 and 16 makes for easier maths (pre-calculators). It's easier to divide and get an integer. With easy access to calculators and highly precise measurements (especially digital systems) metric makes more sense and is easier to interpret quickly.

You're thinking in ¢.02 now.

Hexagon socket screws are often used because they are easier to loosen when the screws are very tight. I think in such a case you can't get any further with a Phillips screwdriver.

It has a hex shape, you can use both.

Like I'm going two weld two dimes into a cross for the screw slot when I have a wrench already.

A hex cap screw

Maths may be important, but figuring out what's bigger, 7/16 vs 3/8, is a stupid fucking system when metric exists.

Centimeters/millimeters: "6 is bigger than 5 is bigger than 4"

Inches: "I don't fuckin know what's bigger, 5/16 or 3/8? How about 7/32? Fuck you, I'm just making it all up."

I'm not an aerospace mechanic, but I do have some insight.

The formula in the image is incorrect. It depicts 7/16" - 10 cents = 10 mm, not plus. Notice that 7/16" indicates the gap in the wrench, and the dime makes that gap smaller.

Now that that is out of the way, it seems that a dime is 1.35 mm (I love that American currency is specified in metric). So, 7/16" - 10 cents = 9.7625 mm. So, pretty damn close to 10 mm.