RAM® Square Post Clamp Base for Posts up to 5" Wide Without Hardware

Name: RAM® Square Post Clamp Base for Posts up to 5" Wide Without Hardware
Brand: RAM Mounts
SKU: RAM-247U-5NH
Price: 57.89 USD
Availability: InStock
Rating: 4.6 (5 reviews)

RAM® Square Post Clamp Base for Posts up to 5" Wide Without Hardware - Main image

$57.89 ~~$96.49~~ In stock

Category: Components

The RAM-247U-5NH is a clamp base with 1.5" rubber ball that will connect to rails up to 5" maximum in width. Hardware not included.

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

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 (4.6 / 5 · 5 reviews)

Emily ★★★★★ Oct 22, 2026

This thing clamps tight onto the 3-inch rail on my boat without any slipping. The rubber ball holds my device steady even when I hit some chop.

Claire ★★★★★ Oct 20, 2026

The 1.5" rubber ball locks into my existing mounts perfectly, and the clamp handles my 4" square rail without any wobble. Solid build, exactly what I needed for a permanent install.

David ★★★★★ Oct 18, 2026

The rubber ball snapped right into my existing mount arm without any fuss, and the clamp grips my square tubing perfectly. I was worried about the width, but it handles my 4-inch post with room to spare.