Stud lock

A stud lock for retaining a hanging article on a stud having a generally flat disk shaped head and a stem having a reduced diameter, comprising, first and second body members which may be selectively connected together, said first body member including a generally cylindrical outer portion and an integral generally semicylindrical inner portion, said inner portion having a diametrically disposed shoulder, said outer portion including a cylindrical recess having a diameter greater than the diameter of the head of said stud and having a depth greater than the thickness of the head of said stud, said semicylindrical inner portion having a substantially semi-frusto-conical shoulder for guiding the head of said stud into said recess, said semicylindrical inner portion having an axially disposed semicylindrical groove extending from said semi-frusto-conical shoulder to the exterior surface of said inner portion, said second body member having a flat semicylindrical configuration with a diametrically disposed shoulder for complementary abutting relationship with the shoulder of said first body member, said second body member having an axially disposed semicylindrical groove, said semicylindrical grooves of said first and second members cooperating with each other to define a bore of a size to freely rotatably receive the stem of said stud, screw means for securing said first and second body members in assembled relationship with each other, and said first body member having a radially disposed opening for receiving a tool to prevent rotation of said first body member when said screw means is being applied or removed.