Thanks all for the replies. The reason why I ask is because I ordered a new production Sturmey Archer freewheel for a vintage single speed hub. The freewheel body is considerably thick, around 18mm or so, and protrudes well beyond the RH cone. I suppose one solution might be to add several cone locknuts to increase the OLD and give clearance that way. But I was thinking maybe I'd be better off with a vintage freewheel with a thinner body. Here are some pics of the Sturmey Archer freewheel screwed on to the vintage hub (missing cone locknuts, didn't come with any).

Nice thing about the SA hub is that it comes in 22 tooth (vintage freewheels seem to only come in 20 tooth as the largest size) and I have a removal tool that works quite well (4 prong). It's also brand new.