RAM Double Ball Mount with Round & Diamond Bases - C Series - Medium Arm

RAM-138U RAM® Double Ball Mount with Round & Diamond Bases – C Size Medium

The RAM-138U is a drill-down mounting solution pairing a round AMPS base and a diamond AMPS base on a medium C Series double socket arm, giving near-infinite adjustment with two mounting-hole options in one mount.

Key Features

• Round base with the universal AMPS hole pattern for surface mounting; diamond base with the 2-hole AMPS pattern for lighter device holders
• Includes one round ball base, one diamond ball base, and a C Series medium-length double socket arm
• RAM® ball-and-socket technology allows near-infinite adjustability and dampens shock and vibration
• Powder-coated, marine-grade aluminium construction
• Backed by RAM Mounts' lifetime warranty

Works With

The round base bolts down using the 4-hole or 3-hole AMPS pattern, while the diamond base connects to RAM® and many third-party cradles with the 2-hole AMPS pattern. The 1.5" C Size balls suit any RAM® holder built for a C Size ball.

Dimensions & Specifications

• Overall height: 187mm (7.35")
• Diamond base: 61.7 x 33.3mm (2.43 x 1.31"), 2-hole AMPS 48.6mm (1.912") centre-to-centre
• Round base: 63.5mm (2.5") diameter; 4-hole AMPS 30 x 38mm, 3-hole AMPS 120° 46.0mm
• Ball size: 1.5" rubber ball, C Size
• Material: powder-coated marine-grade aluminium
• Weight: 508g (1.12 lbs)
• Load rating: 1.814kg (4 lbs) standard use, 1.36kg (3 lbs) heavy-duty use

What's Included

• RAM-202U round base with 1.5" ball
• RAM-238U diamond base with 1.5" ball
• RAM-201U double socket arm for C Size 1.5" balls

FAQs

Q: What size screws do the base plates take?
A: The AMPS patterns most commonly take #8, #10, M4, or M5 screws. If you're pairing this with a RAM® holder, the holder comes with its own hardware; surface-mount hardware for your own application isn't included.