Measuring the Diameter of a Hex

[[Je...]]

So I have a hexagon and Im trying to figure out the DIA of it or even the distance from one side to the other. However something isn't working and Im lost. Help!!

[[Cl...]]

Is it a hex driver? (major/minor diameters) We specialize in hexalobe surgical drivers. If you have curve, just slice a nominal plane through the section where you want to measure the diameter, section and Scan the curve. Then recall the curve points into a circle feature, and set the evaluation to MCE for the major dia, or MIE for the minor dia. Without curve, create a nominal circle, open a circle path, under "strategy" tick "single (6) points" then set your start angle and angle range to 360.

If it's simply a hexalobe shape (no major/minor dia), measure the 6 planes, and intersect them all (result 6 lines) intersect each intersection (line) to a plane on either the top or bottom (result 6 points) recall those points into a circle.

[[Gr...]]

I think you need to explain the question better.
Hexagons do not have a diameter.

[[Cl...]]

We measure major and minor diameters of hex divers.
I'm assuming he means the diameter of the 6 points,
(what size ID would fit over the hex)?

[[Ro...]]

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Polygons are generally drawn to diameters, i guess you'd call it inscribed.
This is solidworks screen, Select center, select number of sides, define diameter.

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[[Ro...]]

If its a small hex like Clarke stated for a hex drive, possibly you could just scan it as a circle and turn your filters on to maximum inscribed element, and it'll find the 3 points to make the smallest circle possible.
also you could create a "minimum feature" for this.

I've never done this for size, but i did do this (circle inside hex) for a true position callout that worked very well.
it matched up almost identical to hard gaging.

[[Jo...]]

I recently had a drawing with hex that stated " .750" 3 places". I measured each with gage blocks. That accounts for draft and parallelism , but not for simultaneous flats. Ideally you would have a hex shaped go/no go which would meet functional requirement. If you gage with round pin, or max inscribed, it will be the smallest point but has no consideration of form.