

RAM Mounts Double Socket Arm with Round Ball Plate, C-Size, Medium (RAM-103U) combines a medium 145 mm C-size (1.5") double socket arm with a 63.5 mm round plate whose ball sits at a right angle to the plate. The plate bolts to any cradle with the universal AMPS pattern, while the open socket end attaches to a C-size base you already have or choose for the job – a clamp, suction cup or drill-down base. A practical way to add a device to an existing RAM installation.
📦 What's in the box – RAM-103U
- Double socket arm (C size, medium) – 145 mm overall, 118 mm socket to socket
- Round plate with C-size ball – Ø 63.5 mm, AMPS 4-hole (30 × 38 mm) and 3-hole 120° (Ø 46 mm) patterns
💡 To get started, you might also consider a C-size base for the mounting surface, such as a C-size double U-bolt base for rails, a medium Tough-Claw clamp or a C-size square post clamp.
Key Features
- Patented ball-and-socket system – C-size (1.5") rubber balls adjust at both ends of the arm and damp shock and vibration
- One open socket – attaches to any C-size base or cradle with a 1.5" ball, so you can build exactly the mount you need
- Medium double socket arm – 145 mm overall, 118 mm socket to socket, with an easy-to-adjust knob
- Universal AMPS pattern – the Ø 63.5 mm round plate has the 4-hole AMPS (30 × 38 mm) and 3-hole 120° (Ø 46 mm) patterns used by most RAM and third-party cradles
- Load capacity – 1.8 kg (4 lb) for standard use, 1.4 kg (3 lb) for heavy-duty use
- Durable construction – powder-coated marine-grade aluminium, backed by RAM's lifetime warranty
Compatibility
- All RAM C-size (1.5") ball bases, adapters and holders
- Cradles and devices with the AMPS 4-hole pattern (30 × 38 mm)
- Holders with the 3-hole 120° pattern (Ø 46 mm)
Technical Specifications
| Part Number | RAM-103U |
|---|---|
| Product Type | Socket arm with ball plate |
| Connection | RAM C-size ball (1.5"); AMPS 4-hole (30 × 38 mm); 3-hole 120° (Ø 46 mm) |
| Load Capacity | 1.8 kg (4 lb) for standard use, 1.4 kg (3 lb) for heavy-duty use |
| Material | Powder-coated marine-grade aluminium |
| Dimensions | Arm 145 mm overall (118 mm socket to socket); round plate Ø 63.5 mm |
| Weight | 0.42 kg (0.93 lb) |
| Warranty | Lifetime warranty (RAM Mounts) |
| In the Box | Double socket arm (C size, medium), round plate with C-size ball |
More RAM cradles, ball bases and socket arms are waiting in our Mobile Terminal Accessories collection. Planning a vehicle or forklift installation, or ordering for a whole fleet? Contact us for project support and volume pricing.
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