RAM® Composite Ball Adapter with AMPS Plate

Name: RAM® Composite Ball Adapter with AMPS Plate
Brand: RAM Mounts
SKU: RAP-B-347U
Price: 5.94 USD
Availability: InStock
Rating: 5.0 (5 reviews)

RAM® Composite Ball Adapter with AMPS Plate - Main image

$5.94 ~~$8.49~~ In stock

Category: Components

The RAP-B-347U base consists of a 1" diameter rubber ball connected at right angles to a 2" x 1.7" square base. The base has four pre-drilled holes at each corner, making the universal 1.5 x 1.188 (hole spacing) AMPS hole pattern.

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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Penelope R. ★★★★★ Oct 23, 2026

The 1" rubber ball feels solid and holds my device firmly in place, and the right-angle design is perfect for mounting in tight spots. Those four pre-drilled corners lined up exactly with my existing plate, so installation took all of two minutes.

Andrew ★★★★★ Oct 22, 2026

The pre-drilled holes on the square base lined up perfectly with my existing mounting setup, saving me from having to drill anything myself. That rubber ball is surprisingly firm yet gives just enough for fine adjustments. Exactly what I needed to keep my tablet secure on bumpy roads.

Joseph ★★★★★ Oct 21, 2026

I was a little skeptical about the rubber ball connection, but it’s surprisingly sturdy once you tighten the screws through those pre-drilled holes. It holds my tablet mount rock-solid on the boat, even through some choppy water.