On a french press, there is a piece that sits on the bottom of the plunger rod above the filtering discs called a shoulder nut. The purpose of this piece is to keep the filtering discs plunged down and in place so they don't tilt and allow the coffee grounds to pass between the discs and carafe when the coffee is poured into a cup.
My piece recently came loose and the company sent me a metal replacement that screws on (the original piece came attached to the plunger). Does this require tevila since it touches the food, or not since it isn't directly preparing the food?