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RAM® Double Socket Arm with Round Ball Plate - C Size Short
Part #: RAM-103U-B UPC: 793442913167 Features 2.5" round plate connects to RAM® device holders containing the universal AMPS hole pattern Includes C size short length double socket arm; ball and socket technology allows for near-infinite adjustability Made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments Backed by a lifetime warranty

Product Information
Overview	The RAM-103U-B consists of the 1.5" diameter ball and socket system with one open socket end. This mount is designed to be used with any of the RAM mounting bases or cradles with a 1.5" diameter rubber ball. The round base has a 1.5" diameter rubber ball connected at right angles to a 2.5" diameter base. The plate has pre-drilled holes in the base, including the universal AMPS hole pattern.

Specifications
socket to socket length	2.5"
hole pattern	4-Hole AMPS: 1.181" x 1.496" 3-Hole 120-Degree: 1.812" Diameter
ball size	C Size (1.5")
weight capacity	Standard Use: 4 lbs Heavy-Duty Use: 3 lbs
materials	Marine-grade aluminum
packaging type	Poly Bag
Weight	0.71 lb

RAM® Double Socket Arm with Round Ball Plate - C Size Short

RAM® Double Socket Arm with Round Ball Plate - C Size Short

Name: RAM® Double Socket Arm with Round Ball Plate - C Size Short
Brand: RAM Mounts
SKU: RAM-103U-B
Price: 45.49 USD
Availability: InStock

Part#: RAM-103U-B

UPC: 793442913167

$45.49

Options

Every RAM® mount is built around a rubber ball and socket system. The ball size sets how much weight the mount can carry. Match it to your device for smooth adjustment with a rock-solid hold.

RAM Mounts ball size specifications and typical uses
Size	Ball Diameter	Max Load*	Best For
A	0.56" (14.3 mm)	0.5 lb	Action cameras and other ultra-light devices
B	1" (25.4 mm)	2 lbs	Phones, GPS units, and small tablets — the most common size
C — this product	1.5" (38.1 mm)	4 lbs	Large tablets, fish finders, and rougher rides
D	2.25" (57.2 mm)	6 lbs	Rugged tablets, laptops, and heavy equipment
E	3.38" (85.9 mm)	15 lbs	Large displays and demanding aviation or industrial use

*Approximate capacity for a standard ball with a mid-length arm. Shorter arms and steel-reinforced posts increase real-world capacity.

Reading part numbers

The letter after RAM tells you the ball size: RAM-B-166 uses a 1" B ball, while RAM-D-201 uses a 2.25" D ball. C size parts are the exception and carry no letter, so RAM-201U is a C size arm.

Short, medium, and long double socket arms compared side by side. This product uses a Short arm — Arm lengths

The double socket arm clamps over two balls — one on the base and one on your device holder. Arm length sets your reach: short arms are the most stable, while longer arms give you more freedom to position the device.

RAM Mounts overall and socket-to-socket arm lengths by ball size
Arm Length	Measurement	A Size	B Size	C Size — this product's ball size	D Size	E Size
Short	Overall Length	N/A	2.42"	3.56" — this product	5.69"	5.69"
Short	Socket-to-Socket Length	N/A	1.75"	2.5"	4.66"	4.66"
Medium	Overall Length	2.42"	3.73"	5.69"	8.44"	12.63"
Medium	Socket-to-Socket Length	1.75"	3"	4.66"	6.88"	9.88"
Long	Overall Length	3.56"	6"	9.13"	12.98"	N/A
Long	Socket-to-Socket Length	3.12"	5.31"	8"	11.41"	N/A

Options

RAM® Round Plate with Ball - C Size

$19.49

Overview

The RAM-103U-B consists of the 1.5" diameter ball and socket system with one open socket end. This mount is designed to be used with any of the RAM mounting bases or cradles with a 1.5" diameter rubber ball. The round base has a 1.5" diameter rubber ball connected at right angles to a 2.5" diameter base. The plate has pre-drilled holes in the base, including the universal AMPS hole pattern.

Features

2.5" round plate connects to RAM® device holders containing the universal AMPS hole pattern
Includes C size short length double socket arm; ball and socket technology allows for near-infinite adjustability
Made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments
Backed by a lifetime warranty

socket to socket length:

2.5"

hole pattern:

4-Hole AMPS: 1.181" x 1.496"
3-Hole 120-Degree: 1.812" Diameter

ball size:

C Size (1.5")

weight capacity:

Standard Use: 4 lbs
Heavy-Duty Use: 3 lbs

materials:

Marine-grade aluminum

packaging type:

Poly Bag

Weight:

0.71 lb

Return Policy:

All products purchased from RAM® can be returned within 30 days with no restocking fee (return shipping not provided). See full return policy here.

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QUESTIONS & ANSWERS

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Does this SKU include the hardware needed to bolt it to a flat surface?

No, the hardware required to install this mount is not included. Because these are mounted to such a wide variety of materials and applications we do not know what hardware to provide. The best resource for that type of information is usually a local hardware store or the manufacturer of the vehicle you are mounting to.