End-of-life (EOL) is a term used with respect to a product, indicating that the product is in the end of its product lifetime and a manufacturer will no longer be producing a particular product and may also be limiting or ending support for the product. In the specific case of product sales, the term end-of-sale (EOS) has also been used. The term lifetime, after the last production date, depends on the product and is related to a customer's expected product lifetime.
If you are designing a product, you should inquire as to the future availabilty of the particular products in your BOM (bill of materials). This will avoid any confusion and complications in the future. Also, it is recommended that your design permit an easy change and adaptability to a product with slightly different dimensions.