RAM® Ball Adapter with 1/4"-20 Threaded Post - B Size
1" (25.4 mm) "B" Size Ball, with Male 1/4''-20 thread

The RAM-B-237U universal camera and camcorder base consists of a B size 1" rubber ball connected to a 1/4"-20 camera thread. The male 1/4"-20 threaded steel stud will connect to any standard female thread found on digital cameras, camcorders, and other devices.

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-224 suction cup (for canopy mounting) or RAP-B-238U base (for instrument panel or cockpit sidewall mounting). Detailed drawing: ram-b-237.pdf

FEATURES:

• Universal camera and camcorder ball base opens your device to the RAM® mounting system
• Included B size 1" RAM® rubber ball allows for connection to any B size RAM® double socket arm; ball and socket technology allows for near-infinite adjustability
• Made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments
• Backed by a lifetime warranty

SPECS:
Thread Pitch:
1/4"-20 x .25" 

Ball Size:
B Size (1")

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

Materials: 
Marine-grade aluminum

Weight:
0.06 lb

Q&A
Q: How long is the threaded post?
A: The male threaded post in the RAM-B-237U is .25" long.

Q: What is the aluminum shaft diameter?
A: The diameter of the post directly under the ball is approximately .28"