

RAM Mounts Twist-Lock Suction Cup Double Ball Mount (RAM-B-166U) is a complete windshield mount: a Ø 84 mm Twist-Lock suction cup base, a medium B-size double socket arm (95 mm overall) and a 62 × 33 mm diamond plate with the 2-hole AMPS pattern for the device holder. It holds firmly on glass and smooth, non-porous plastic, including RAM adhesive discs, and comes off without tools – ideal for delivery vans, trucks, cars and boats, or for moving a device between vehicles.
📦 What's in the box – RAM-B-166U
- Twist-Lock suction cup base with ball – Ø 84 mm suction cup, B-size ball (RAM-B-224-1U)
- Double socket arm – B-size, medium, 95 mm overall, 76 mm socket to socket (RAM-B-201U)
- Diamond ball base – 62 × 33 mm, 2-hole AMPS, B-size ball (RAM-B-238U)
- Assembly hardware – for assembling the components
💡 To get started, you might also consider a device holder with the 2-hole AMPS (diamond) pattern, such as the universal small-device holder with diamond pattern.
Key Features
- Twist-Lock suction cup – Ø 84 mm (3.3") cup locks with a twist of the lever onto windshields, glass and other smooth, non-porous surfaces
- Adjustable at both ends – medium arm, 95 mm overall; one knob locks both ball joints
- Diamond plate – 62 × 33 mm with 2-hole AMPS pattern (48.6 mm); fits most RAM cradles
- Load rating – up to 2 lb (0.9 kg) in standard use and 1 lb (0.45 kg) in heavy-duty use; ideal for phones, GPS units, scanners and small tablets
- Materials – powder-coated marine-grade aluminium and high-strength composite
- Lifetime warranty – the suction cup rubber is a wear part and is not covered
Compatibility
- Windshields, glass and smooth non-porous plastic, incl. RAM adhesive discs
- Device holders with the 2-hole AMPS pattern (48.6 mm hole spacing)
Technical Specifications
| Part Number | RAM-B-166U |
|---|---|
| Product Type | Mounting kit, B-size |
| Connection | B-size (1" / 25.4 mm) ball; diamond plate 62 × 33 mm with 2-hole AMPS pattern (48.6 mm) |
| Arm Length | 95 mm (3.73") overall; 76 mm (3") socket to socket |
| Load Capacity | 2 lb (0.9 kg) standard use; 1 lb (0.45 kg) heavy-duty use |
| Dimensions | Overall height 170 mm (6.69"); suction cup Ø 84 mm |
| Material | Powder-coated marine-grade aluminium and high-strength composite |
| Weight | 0.32 kg (0.71 lb) |
| Warranty | Lifetime warranty (RAM Mounts); the suction cup rubber is a wear part and is excluded |
| In the Box | Twist-Lock suction cup base with ball, double socket arm, diamond ball base, assembly hardware |
You will find matching cradles, holders and more RAM mounting parts 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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