RAM® Ball Adapter with Round Plate and 1/4"-20 Threaded Stud - B Size
Base Plate, Round, Aluminum, with 1" (25.4 mm) "B" Size Ball, with Male 1/4''-20 thread

The RAM-B-202AU, universal camera and camcorder base, consists of a 1" diameter rubber ball, connected to a 2.5" diameter round plate with 1/4"-20 camera thread. The round plate provides extra support and stability for cameras that rest on top of it. The male 1/4"-20 threaded steel stud will connect to any standard female thread found on camcorders and digital cameras.

2 7/16" (62 mm) diameter marine grade aluminum base plate with Male 1/4''-20 thread.  This is the similar to a RAM-B-202U with a Male 1/4''-20 thread.  The 1/4" thread could be used to hold a camera or GPS/logger such as a Cambridge GPS-NAV (but not a Volkslogger which has an M5 thread).  For that application you would also want a RAP-B-201U arm and a RAM-B-224U suction cup (for canopy mounting) or RAM-B-238U base (for instrument panel or cockpit sidewall mounting).

SPECS:

Hole Pattern:
4-Hole AMPS: 1.181" x 1.496"
3-Hole 120-Degree: 1.812" Diameter

Thread Pitch: 
1/4"-20 x .25"

Plate Size:
2.5" diameter

Ball Size:
B Size (1")

Weight Capacity:
Standard Use: 2 lbs
Heavy-Duty Use: 1 lb

Materials: 
Marine-grade aluminum

Weight:
0.16 lb