Amazon.com : Camera Screw Adapter Thread 1/4" Male to 3/8" Female and 3/8" Male to 1/4" Female Adapter Set for Camera Monitor, Tripod, Mount : Electronics
6 Pieces Camera Screw Adapter, Screw Adapter, 3/8" To 1/4" Thread Screw Adapter, Brass, For Tripods, Cameras, Photo Monopods, Ball Heads, Flash Mounts | Fruugo GR