I am reading lots of bad reviews on these pigtails.  What worries me the most is some seem to be shipping with a different thread type and people are stripping them trying to make them work.  Why the heck can't these be standardized?  I've also read that some come with different sizes of NPT as well as different thread types.  It seems that what is listed is not always what you order, and on top of that, someone like me, who does not know how to recognize the different thread types and sizes won't even know if I received the correct part or the wrong part.I recommend you double check your part number on the hose before installing them to avoid stripping your regulator.I thought, why not use quick connect hoses to connect my regulator to my appliance.  It seems these mate up nice to other quick connects--but only if made by CAMCO, and then these quick connect fittings don't mate up easily to the other parts like regulators etc.  WTF?  I need still another adapter?  And some people tell me perhaps multiple adapters to make it all work?  I'm not going to use three different adapters to mate up a quick connect.  That means I have a huge lunking thing sticking out ready to be damaged, knocked out of place, that is sure to leak out all my expensive propane.Ok, so I called CAMCO.  I wanted to be sure I ordered the right part and spoke to two different people at CAMCO that blew me off.  It seems Camco parts don't necessarily fit each other.  And they don't sell adapters to make them fit. It would be great if they could provide some customer support and perhaps make up some custom hoses to help people make things work.I give this a 1 star because CAMCO's huge fail in helping me put together a system that will allow me to hook up external tanks to my RV.One star also, because they ship different types of hose fittings and buyers don't know what they are getting.Honestly, I'd like to order one of every one of their parts and analyze them.  I'm an engineer, and if I can't figure out what to order, based on conflicting information--reviews that report receiving different size fittings 1/4&#34; npt than specified 3/8&#34; npt, and a multitude of part numbers--and a need for adapters when a buyer should be able to buy everything he or she needs without an adapter---it all tells me CAMCO has not thought out how their products are used.Think about it, there are only so many way propane tanks, hoses and appliances are hooked up. I don't see any need for adapter other than those that attach to the tanks.