RAM Mounts Google Search

RAM® Square Post Clamp Base for Posts up to 5" Wide - D Size

RAM® Square Post Clamp Base for Posts up to 5" Wide - D Size - Main image
$71.91 $115.99 In stock

Category: Components

The RAM-D-247U-5 is a square post clamp base designed for posts up to 5" wide. It is part of the RAM Mounts D Size component line and includes a 2.25" ball for attaching compatible RAM Mounts D Size arms and holders.

  • Clamp base for square posts up to 5" wide
  • Includes a 2.25" D Size ball
  • D Size ball is rated to hold up to 6 lbs
  • Listed under RAM Mounts components and square post clamps
  • SKU: RAM-D-247U-5
Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

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

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

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

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

View policy

Customer Reviews (4.6 / 5 · 5 reviews)

Grace U. ★★★★★

Installed this on a wooden post at my dock and the ball mount feels rock solid. The clamp tightened evenly around the 4x4 without any slipping.

Richard E. ★★★★★

Finally found a clamp that actually fits my 4-inch wooden posts without any shims or adapters. The stainless steel hardware feels really solid and should hold up well to the weather.

Charlotte ★★★★★

The 2.25" ball connects perfectly with my existing D size arm, and the clamp grips my 5-inch post without any wobble even on bumpy roads. I was worried about install time, but it took under ten minutes with basic tools.