Until today I still did not know where a (scantron-required, supposedly) #2 pencil falls on this chart! The other chart in the article shows that #2=HB, which is about as confusing as the could've made it.<p><a href="https://en.wikipedia.org/wiki/File:PencilGradingChart.png" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/File:PencilGradingChart.png</a>
Nice, cool stuff. High school hand drafting taught me a lot about the practical differences between hardness weights and their uses (e.g. center lines may require different weight than dimensions; can't remember specifics at this point). This page goes into much more detail beyond drafting as it's the page for "pencil".