RAM® Double Socket Arm with Jam Nut - D Size Short

Part#: RAM-D-201U-C-MI1
UPC: 793442220135

Kit Components

$72.49

Overview

The RAM-D-201U-C-MI1, short double socket arm with jam nut, has a socket at both ends that accommodates 2.25" ball bases. A single spring inside the arm opens the end sockets, allowing you to pivot the ball and socket connection. This socket technology allows for almost infinite adjustment and perfect viewing angles.

Features

  • Low-profile design with an overall length of 5.1" and socket-to-socket length of 3.6"
  • Attaches to any D size RAM® ball component, including mounting bases and device holders; double ball and socket technology allows for near-infinite adjustability of your RAM® mounting system
  • Made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments
  • Backed by a lifetime warranty

product dimensions:

Overall Length: 5.1"

socket to socket length:

3.6"

ball size:

D Size (2.25")

weight capacity:

Standard Use: 6 lbs
Heavy-Duty Use: 5 lbs

materials:

Marine-grade aluminum

packaging type:

Poly Bag

Weight:

1.8 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

Have a Question?

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  • What is the difference between RAM-D-201U-C-MI1 and RAM-D-201U-C? not clear on what the jam nut does?

    The Jam Nut is a built-in security feature inside the knob of your RAM Arm. It can be adjusted with a nut driver and acts as a stop point, so the knob can’t be loosened past where you set it.

    You can tighten the Jam Nut so the mount can’t be loosened at all, or leave some flexibility so the knob can still be turned for adjustments without the mount coming apart. For example, many boat owners like using the Jam Nut to keep guests from accidentally loosening the knob on their mount too far and losing parts in the water.

RAM® Double Socket Arm with Jam Nut - D Size Short
$72.49

Size Guide

Ball sizes
  • A Size 0.56" ball
  • B Size 1" ball
  • C Size 1.5" ball
  • D Size — this product 2.25" ball
  • E Size 3.38" ball

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
A0.56" (14.3 mm)0.5 lbAction cameras and other ultra-light devices
B1" (25.4 mm)2 lbsPhones, GPS units, and small tablets — the most common size
C1.5" (38.1 mm)4 lbsLarge tablets, fish finders, and rougher rides
D — this product2.25" (57.2 mm)6 lbsRugged tablets, laptops, and heavy equipment
E3.38" (85.9 mm)15 lbsLarge 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.

Add-on & Accessories

Socket Arms
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Knob Accessories
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