RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – product photo
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – alternative view
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – additional view
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – product photo
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – alternative view
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – additional view
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – product photo
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – alternative view
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – additional view
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – product photo
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – alternative view
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – additional view

RAM Mounts Steel-Reinforced Square Post Clamp Base for Posts up to 4" Wide, D-Size (RAM-D-247U-4-IN1)

70,46 € +VAT
Ball size
C (1.5")D (2.25")
Material
AluminumAluminum (steel-reinforced)
Clamp range
44.5–101.6 mm (1.75–4")Up to 101.6 mm (4")Up to 127 mm (5")Up to 50.8 mm (2")Up to 63.5 mm (2.5")Up to 76.2 mm (3")
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  • Available: Out Of Stock
  • Vendor: RAM MOUNT
  • Type: For Mobile Terminals
  • Barcode: RAM-D-247U-4-IN1
RAM Mounts steel-reinforced D-size square post clamp base for posts up to 4 inch wide – product photo
RAM MOUNT
RAM Mounts Steel-Reinforced Square Post Clamp Base for Posts up to 4" Wide, D-Size (RAM-D-247U-4-IN1)
70,46 € +VAT

RAM Mounts Steel-Reinforced Square Post Clamp Base (RAM-D-247U-4-IN1) clamps onto square posts up to 4" (101.6 mm) wide and carries a D-size 2.25" (57 mm) rubber ball for any RAM D-size double socket arm. It is a no-drill base for rugged tablets, laptops and vehicle-mount computers on forklift posts, racking, carts and machine frames. Its steel-reinforced D-size ball is built for heavier devices, and narrower posts are covered by rotating the base so the bolts sit flush against the post. The clamp is adjustable and easy to remove, and the powder-coated marine-grade aluminium is made for vibration, weather and workshop use.

📦 What's in the box – RAM-D-247U-4-IN1

  • Steel-Reinforced Square Post Clamp Base – with steel-reinforced D-size 2.25" rubber ball, for square posts up to 4" wide
  • Mounting hardware – 2× machine screw 5/16"-18 x 3", 2× nyloc nut 5/16"-18

💡 To get started, you might also consider a short D-size double socket arm and a ball plate for the device side, such as the D-size VESA 75 × 75 plate or the D-size round AMPS plate.

View accessories →

Key Features

  • Square post clamp – fits square posts up to 4" (101.6 mm) wide; adjustable and easy to remove
  • Steel-reinforced ball – the D-size ball is reinforced for heavier devices on forklifts; for narrower posts, rotate the base so the bolts sit flush against the post
  • D-size ball – 2.25" (57 mm) rubber ball fits any RAM D-size double socket arm; the ball-and-socket joint allows near-infinite adjustment
  • Load rating – 6 lb (2.7 kg)
  • Rugged build – powder-coated marine-grade aluminium, backed by RAM's lifetime warranty

Compatibility

  • Square posts up to 4" (101.6 mm) wide
  • All RAM D-size (2.25") double socket arms and D-size ball components

Technical Specifications

Part Number RAM-D-247U-4-IN1
Product Type Square post clamp base with ball
Connection RAM D-size ball, 2.25" (57 mm)
Clamp Range Square posts up to 4" (101.6 mm) wide
Load Rating 6 lb (2.7 kg)
Material Powder-coated marine-grade aluminium, post reinforced with a steel bolt
Weight 0.70 kg (1.54 lb)
Warranty Lifetime warranty (RAM Mounts)
In the Box Steel-Reinforced Square Post Clamp Base, 2× machine screw 5/16"-18 x 3", 2× nyloc nut 5/16"-18

Looking for a device to mount? Browse our Vehicle Mount Terminals range. Planning a vehicle or forklift installation, or ordering for a whole fleet? Contact us for project support and volume pricing.

Available Versions

Part NumberBall sizeMaterialClamp rangePrice
RAM Mounts Square Post Clamp Base for Posts up to 4" Wide, C-Size (RAM-247U-4) RAM-247U-4C (1.5")AluminumUp to 101.6 mm (4")56,74 €+VATOut of Stock View
RAM Mounts Square Post Clamp Base for Posts up to 5" Wide, C-Size (RAM-247U-5) RAM-247U-5C (1.5")AluminumUp to 127 mm (5")106,87 €+VATOut of Stock View
RAM Mounts Square Post Clamp Base for Posts 1.75–4" Wide, D-Size (RAM-D-247U) RAM-D-247UD (2.25")Aluminum44.5–101.6 mm (1.75–4")73,05 €+VATOut of Stock View
RAM Mounts Square Post Clamp Base for Posts up to 2" Wide, D-Size (RAM-D-247U-2) RAM-D-247U-2D (2.25")AluminumUp to 50.8 mm (2")45,97 €+VATOut of Stock View
RAM Mounts Square Post Clamp Base for Posts up to 2.5" Wide, D-Size (RAM-D-247U-25) RAM-D-247U-25D (2.25")AluminumUp to 63.5 mm (2.5")48,37 €+VATOut of Stock View
RAM Mounts Square Post Clamp Base for Posts up to 3" Wide, D-Size (RAM-D-247U-3) RAM-D-247U-3D (2.25")AluminumUp to 76.2 mm (3")44,09 €+VATOut of Stock View
RAM Mounts Square Post Clamp Base for Posts up to 4" Wide, D-Size (RAM-D-247U-4) RAM-D-247U-4D (2.25")AluminumUp to 101.6 mm (4")63,11 €+VATIn Stock
RAM Mounts Steel-Reinforced Square Post Clamp Base for Posts up to 4" Wide, D-Size (RAM-D-247U-4-IN1) RAM-D-247U-4-IN1ViewingD (2.25")Aluminum (steel-reinforced)Up to 101.6 mm (4")70,46 €+VATOut of Stock

Accessories

ProductPrice
RAM Mounts Double Socket Arm, D-Size, Short, 130 mm (RAM-D-201U-C) RAM Mounts Double Socket Arm, D-Size, Short, 130 mmRAM-D-201U-C63,09 €+VATIn Stock
RAM Mounts Double Socket Arm, D-Size, Medium, 214 mm (RAM-D-201U) RAM Mounts Double Socket Arm, D-Size, Medium, 214 mmRAM-D-201U93,10 €+VATIn Stock
RAM Mounts Double Socket Arm, D-Size, Long, 330 mm (RAM-D-201U-E) RAM Mounts Double Socket Arm, D-Size, Long, 330 mmRAM-D-201U-E142,80 €+VATOut of Stock View
RAM Mounts 75 × 75 mm VESA Plate with Ball, D-Size (RAM-D-2461U) RAM Mounts 75 × 75 mm VESA Plate with Ball, D-SizeRAM-D-2461U35,19 €+VATIn Stock
RAM Mounts Round AMPS Plate with Ball, D-Size (RAM-D-254U) RAM Mounts Round AMPS Plate with Ball, D-SizeRAM-D-254U30,06 €+VATIn Stock
RAM Mounts 100 × 100 mm VESA Plate with Ball, D-Size (RAM-D-246U) RAM Mounts 100 × 100 mm VESA Plate with Ball, D-SizeRAM-D-246U42,04 €+VATIn Stock

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