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RAM Mounts RAM 2.5 Max Width Clamp Base with D Size 2.25 Diameter Ball (RAM-D-247U-25)

RAM Mounts RAM 2.5 Max Width Clamp Base with D Size 2.25 Diameter Ball (RAM-D-247U-25)
RAM Mounts RAM 2.5 Max Width Clamp Base with D Size 2.25 Diameter Ball (RAM-D-247U-25)
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R1,418
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On a fishing boat, a skipper needs to mount a fish finder where the rail is too thick for standard clamps. The RAM-D-247U-25 solves this with a 2.5-inch jaw opening, gripping rails, bars, or flat surfaces from 0.625 to 2.5 inches. Its D-size 2.25-inch ball connects to any RAM D-size arm, providing a... Read More
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Stock 56 Code 3488146 Brand RAM MOUNTS Model RAM-D-247U-25 Warranty 2 Years

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Estimated delivery Tuesday, October 6
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On a fishing boat, a skipper needs to mount a fish finder where the rail is too thick for standard clamps. The RAM-D-247U-25 solves this with a 2.5-inch jaw opening, gripping rails, bars, or flat surfaces from 0.625 to 2.5 inches. Its D-size 2.25-inch ball connects to any RAM D-size arm, providing a solid foundation for electronics in marine, automotive, or industrial settings.

Key specifications

  • Ball size: D (2.25 inch / 57.15 mm diameter)
  • Clamp type: C-clamp / jaw clamp
  • Maximum clamp opening: 2.5 inches (63.5 mm)
  • Minimum clamp opening: 0.625 inches (15.88 mm)
  • Clamp jaw width: 1.25 inches (31.75 mm)
  • Clamp jaw depth: 1.5 inches (38.1 mm)
  • Material: Powder coated marine grade aluminum
  • Finish: Black powder coat
  • Compatibility: RAM Mounts D size components
  • Product type: Mounting base
  • Overall height (base): 5.5 inches (139.7 mm)
  • Overall length (base): 5.5 inches (139.7 mm)
  • Overall width (base): 2.5 inches (63.5 mm)
  • Mounting hardware included: No (base only)
  • Warranty: Manufacturer's lifetime warranty

Why choose it

Built from marine-grade aluminum with a durable powder coat, this clamp base withstands harsh environments. The wide jaw opening accommodates larger rails and tubes, while the D-size ball offers compatibility with a vast ecosystem of RAM mounts. Its robust construction ensures a secure hold, reducing vibration and keeping your device stable.

Ideal use cases

  • Marine: mounting fish finders, chartplotters, or radios on boat rails
  • Automotive: attaching devices to roll bars or thick handlebars
  • Industrial: securing equipment to pipes or beams
  • General purpose: any application requiring a sturdy clamp base with a 2.25-inch ball

Good to know

The clamp base is sold without mounting hardware; you will need a compatible RAM D-size arm and device holder to complete your setup. The lifetime warranty reflects RAM Mounts' confidence in its durability. For installation, ensure the surface is clean and the clamp is tightened securely to prevent slippage.

Specifications
Brand
RAM Mounts
Category
Mounting Base
Country of origin
United States
Depth
1.5 inches (38.1 mm)
EAN
793442224744
Height
5.5 inches (139.7 mm)
Housing material
Powder Coated Marine Grade Aluminum
Model
RAM 2.5 Max Width Clamp Base with D Size 2.25 Diameter Ball
MPN
RAM-D-247U-25
Packaging content
Clamp base only (no arm or holder)
Product colour
Black
Quantity per pack
1
Warranty period
Lifetime
Weight
0.2 kg
Width
2.5 inches (63.5 mm)
Price history over the last 6 months
RAM Mounts RAM 2.5 Max Width Clamp Base with D Size 2.25 Diameter Ball (RAM-D-247U-25)
Current
R1,418
Lowest
R1,363
Highest
R1,418
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