RAM 1/4″-20 Female Threaded Hole with 1″ Ball
The RAM-B-348U includes a 1/4″-20 female thread connected to a 1″ rubber ball.
Material:
Powder Coated Marine Grade Aluminum
Ball Size:
1″ Rubber Ball “B” Size
Note:
The “U” in the part number reflects product packaged in poly bag.

![RAM Mount Composite Short Double Socket Arm f/1" Ball [RAP-B-201U-A]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/ram-mount-composite-short-double-socket-arm-f-1-ball-rap-b-201u.webp)
![RAM Mount 1/4"-20 x 2 1/4" Threaded Stud w/1" Ball [RAM-B-273U]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/ram-mount-1-4-20-x-2-1-4-threaded-stud-w-1-ball-ram-b-273u.webp)
![RAM Mount 2.5" Composite Round Base w/1" Ball [RAP-B-202U]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/ram-mount-2-5-composite-round-base-w-1-ball-rap-b-202u.webp)
![RAM Mount Composite Diamond Base w/1" Ball [RAP-B-238U]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/ram-mount-composite-diamond-base-w-1-ball-rap-b-238u.webp)
![RAM Mount Double Ball w/2.5" Round Base [RAM-B-217U]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/ram-mount-double-ball-w-2-5-round-base-ram-b-217u.webp)
![RAM Mount Drill-Down Dashboard Ball Base w/Backing Plate - B Size [RAM-B-202-225-2U]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/ram-mount-drill-down-dashboard-ball-base-w-backing-plate-b-size-ram-b-202-225-2u.webp)
![RAM Mount 1.5" x 2.5" Rectangle Base w/1" Ball [RAM-B-202U-1525]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/ram-mount-1-5-x-2-5-rectangle-base-w-1-ball-ram-b-202u-1525.webp)
![RAM Mount 2.5″ Max Width Square Rail Base w/1″ Diameter Ball [RAM-B-247U-25]](https://www.boataccessorydepot.com/wp-content/uploads/2026/10/ram-mount-2-5-max-width-square-rail-base-w-1-diameter-ball-ram-b-247u-25.webp)