A screw thread, often shortened to thread, is a helical structure used to convert between rotational and linear movement or force. A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix, with the former being called a straight thread and the latter called a tapered thread. A screw thread is the essential feature of the screw as a simple machine and also as a fastener. The mechanical advantage of a screw thread depends on its lead, which is the linear distance the screw travels in one revolution.
Sour cream is a dairy product with a short shelf life. Typically it is good for 2 to 3 weeks from when purchased. Always check the expiration date on the container.
The expiration date is a couple weeks away but I'm sure if I left it in there for a couple weeks after it had been opened, it'd no longer be good. On my fat free cream cheese, it says keep only ten days after opening, even though it doesn't expire for 3 weeks. That's more what I'm looking for but with cottage cheese.