Locking tab washer. It's Solidworks model was exported in other CAD formats:(X_T, IGES, STEP, OBJ and STL). This 3D model can used in producing on CNC machines and for 3D printing.
STL (Stereolithography, filesize: 46 KB), OBJ (OBJ, filesize: 425 KB), IGE (IGES, filesize: 332 KB), SLDPRT (SolidWorks, filesize: 138 KB)