Ball and spring plungers install in fixtures and worktables to position and index workpieces. Plungers have a spring-loaded nose that applies constant pressure to a workpiece. The spring automatically pushes the nose forward to apply light pressure. Ball plungers support top and side loads and are used in light-load applications. Spring plungers support top loads and are used in medium- and heavy-load applications. Ball and spring plunger accessories install and facilitate the use of plungers.