AJAX Post to ASP.NET MVC 6 Controller action method and parameters are null

I am having a strange problem with ASP.NET MVC and sending an AJAX post. I have an anchor tag on the page with id 'lnkGetExpirDates'. When the user clicks it I am trying to simply send this hardcoded data to my controller so it can use it as params and return a result back to the page.I am having a strange problem with ASP.NET MVC