Description
The RAM® Diamond Plate Base combines a C Size 1.5" Ball with a compact 2.43" x 1.31" mounting plate. Its two-hole AMPS pattern allows it to connect directly to a variety of compatible RAM device holders and cradles or serve as a small-footprint drill-down base.
The powder-coated marine-grade aluminum construction provides a durable mounting point for RAM C Size systems while allowing attached equipment to be positioned through a compatible double socket arm.
Key Features
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RAM C Size 1.5" ball connection
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Compact 2.43" x 1.31" diamond plate
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Industry-standard two-hole AMPS mounting pattern
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1.912" center-to-center hole spacing
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Compatible with a variety of RAM device holders and cradles
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Can also be used as a compact drill-down mounting base
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Powder-coated marine-grade aluminum construction
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Supports up to 4 lbs during standard use and 3 lbs during heavy-duty use
Use Cases & Compatibility
This standalone ball base can attach directly to compatible RAM device holders and cradles that use the two-hole AMPS pattern. When paired with a RAM holder or cradle, the holder normally includes the hardware required to connect it to this diamond plate.
The RAM-238U may also be installed as a drill-down base where a compact mounting footprint is preferred. Hardware for attaching the base to a mounting surface is not included. Common drill-down fastener sizes include #8, #10, M4, and M5, depending on the mounting surface and application.
Compatible with a variety of RAM C Size 1.5" socket arms and mounting components.
Specifications
Ball Size: C Size 1.5" Ball
Mounting Pattern: Two-hole AMPS
Hole Spacing: 1.912" center to center
Plate Dimensions: 2.43" x 1.31"
Material: Powder-coated marine-grade aluminum
Weight Capacity: Standard Use: 4 lbs; Heavy-Duty Use: 3 lbs
Product Weight: 0.18 lb
Brand & Warranty
Brand: RAM Mounts
Manufacturer Part Number: RAM-238U
Warranty: Manufacturer’s lifetime warranty.
Gadget Mounts is an Authorized RAM Mounts Dealer.

