The file 'Screw Down Clamp Mount For Articulated Arms 3D Printer Model' is (stl) file type, size is 385.1KB.
Screw down clamp for Articulated Arms that can be found here:
http://www.thingiverse.com/thing:801279
The ball is compatible with that system so you can use all of the parts listed there.
Borrowed the clamp and bolt from a webcam mount that can be found here:
http://www.thingiverse.com/thing:31171
I'm using this setup to mount webcams and LEDs to my printer.
ball_base_with_clamp.stl | 1.4MB | |
BS_Joint.stl | 580.4KB | |
Clamp_bolt.stl | 509.2KB |