Ball Stud Versions

1 - Original version with 10 mm ball diameter. M 6 threads (originally this version was without threads).
2 - Modified version, 19 mm ball diameter, M 6 threads without washer (was used briefly in standard production).
3 - Modified version, 19 mm ball diameter, M 6 threads with washer.
4 - Present version, 19 mm ball diameter, M 8 threads with washer.