A sanitary coupling assembly for mounting on a fluid system includes a female coupler and male coupler.The female coupler has a distal end and a proximal end.The distal end has a first inner threaded surface defining an opening therein to receive an end of a hose. The proximal end has a second inner threaded surface having a polymer coating. The proximal end is configured to matingly engage a complementary structure located on the male coupler.
