Square Post Clamp Base RAM Mounts RAM-247U-4

The RAM-247U-4 Square Post Clamp Base by RAM Mounts is designed to secure a 1.5" rubber ball mount to square or rectangular posts up to 4" (101.6 mm) in width. The clamp base has a durable black finish and provides a stable connection point for compatible RAM arms and device holders, making it suitable for mounting electronic devices and accessories on rails and posts.

Advantages

This clamp base accepts a 1.5" rubber ball and clamps to square posts up to 4" wide, offering a robust and repeatable mounting point. Its black finish resists corrosion and wear, and the unit’s weight and construction deliver stability for attached devices. The design allows integration with the broader RAM ecosystem of arms and holders for flexible positioning.

Suitable for

• Mounting phones, tablets, or GPS units to square or rectangular posts
• Installation on rails, posts, or structural members up to 4" wide
• Use with compatible RAM 1.5" ball arms and device cradles

Key specifications

• Manufacturer: ram mounts
• Model / MPN: RAM-247U-4
• Ball size: 1.5" (38 mm) rubber ball socket
• Maximum post width: 4" (101.6 mm)
• Finish: black
• Weight: 530.7 g
• EAN: 793442024764

How to use

Position the clamp around the square or rectangular post (up to 4" wide) and tighten the clamping hardware until the base is secure and does not move on the post. Attach a compatible RAM arm or device holder to the 1.5" rubber ball socket and adjust the arm to the desired viewing angle, then tighten the arm’s knobs to lock the position. Confirm all fasteners are secure before use.

Recommendations

For safe and reliable operation, use this clamp base only on posts within the specified maximum width, pair it with compatible 1.5" RAM components, and periodically check and retighten fasteners after initial installation and during regular use.