This little curiosity....
Go/NoGo Gauge by
Ron Lowe, on Flickr
... is a Go/NoGo gauge used to verify the correct assembly of some oilfield equipment, from my former nut-mines.
If the kit is correctly assembled, the Go-side should fit into a particular gap, but the NoGo side should not.
It's a small titanium plate, machined to modest tolerances.
I could have had them knocked out at modest cost by any of the machine shops around here.
But no, that was verboten.
We had to source them from the Mothership in Houston.
At furious expense.
All part of the tax wheeze to have fake internal costs soak up all the profits, so there's nothing left to tax.
So it makes me smile sometimes when I look at such a simple little thing and remember it's furious cost!