A medical connector includes a body having a distal end, a proximal end, and a sidewall extending between the distal end and the proximal end. The medical connector further includes a helical thread extending radially outward from a surface of the sidewall and at least one protrusion extending radially outward from a surface of the sidewall. The at least one protrusion has a first side and a second side. A radial height of the at least one protrusion from the surface of the sidewall tapers circumferentially from the first side of the at least one protrusion to the second side of the at least one protrusion.