Where would one get a 17/64 box wrench?

This is kind of a rhetorical question, but the reason I'm asking is because the new rear wheel brake cylinders I just received from Rock Auto (Dorman brand) have 17/64 hexes on the bleeder screws. I have two sets of tiny wrenches, but neither one has a 17/64. I checked the screws with a micrometer, and that is what they are. 9/32 is too big. 1/4 is too small. 7mm is too big (assuming they'd have the gall to put metric hexes on Mopar parts). All I can say is, WTF?:wack: