There's a HRule and VRule component in Flex.
I'm not really getting your "drawing" but I'm quite sure that if it's needed then you can override some methods from the existing components and build your own ruler that behaves the way you want.
With best regards,
you can use ILOG Elixir gauges Components if you can bear the price or use trial version if you want to test it.
black horizontal gauge section in Demo seems to be similar to your specification
or you can use Degrafa
Thanks Barna and Atif for your great suggestions.