Drawing plans and writing a BOM and looking for what that part is called. I brought pictures!
I don't know the proper term for that part.
It's officially called a conduit body, but is sometimes called an LB by tradesmen.
It's known as an "LB", because the outlet (or inlet I guess) is on the back (ell back). There are also "LR" (ell right), "LL" (ell left), "T" (tee), "C" (cee), and "SLB" (service ell back) type conduit bodies available.
SLB not pictured.