Went out to the shop and checked the name brand ~ SunTour, those are the really good high end rebuild-able vintage freewheels. They should NOT be confused with a different present day name brand of SunRace, which are Walmart trash. Also the thread style on vintage freewheels that you want to avoid is "French" threads which have a different pitch to them. ISO threads is what is currently used today and all other threads except for the old french threads will work with the only difference being very slight in the diameter tolerances, where as the french threads have a different pitch and will cross-thread and mess up the threads.

Best current full production line common freewheels are the Shimano, some of the high end older vintage freewheels from the 80's and into the 90's for some brands that survived that long continuing to make freewheels, such as SunTour, but it was not the only one. I have a premium Olympic quality Titanium (as in made out of) corn-cob freewheel I managed to pick-up for a steal of a deal that is on one of my bikes that is made by some brand I never heard of until I bought it and have only seen two others by that brand for sale on the net since but so far I have not had to to replace it and it has been going strong with out the slightest sign of any trouble for years now and the cogs don't even show any wear or the bearings show any sign of loosness at all after several chain replacements and and a chain-wheel replacement on that drive-train.

Long story short, if you really really want a quality screw on freewheel it is possible but you will have to keep your eyes open and have your wallet ready.