RAM® Square Post Clamp Base for Posts 1.75" - 4" Wide - B Size

Part#: RAM-B-247U
UPC: 793442921230
$57.99

Overview

This RAM® Square Post Clamp Base (RAM-B-247U) is a clamp base with B size 1" rubber ball that will connect to square posts ranging from 1.75" to 4" in width. Ideal for forklifts, the slotted holes on this base make this variation the most universal clamp base option; recommended for small devices such as phones, cameras, handheld PCs, and more.

Features

  • Clamping base ideal for square posts from 1.75" - 4" in width; adjustable and easily removable
  • Included B size 1" RAM® rubber ball allows for connection to any B size RAM® 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

hardware included:

Assembly Hardware
(2) 5/16"-18 x 3.5" Hex Bolts
(2) 5/16"-18 Nuts
(2) Flat Washers
(2) Lock Washers
(2) Rubber Caps

clamp range:

1.75" - 4" width

ball size:

B Size (1")

weight capacity:

Standard Use: 2 lbs
Heavy-Duty Use: 1 lb

materials:

Marine-grade aluminum

packaging type:

Poly Bag

Weight:

1.35 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.

Print

Instructions

Documents

QUESTIONS & ANSWERS

Have a Question?

Ask a Question
  • Do you have anything wider than 4" wide? What is the width of the top and bottom clamp parts themselves? Thanks!

    No we do not have the 5" with the B-Size ball. If you would like to look at the 5" with C-Size ball the part number is  RAM-247U-5.

    Please reach out to us at Support@rammount.com for technical drawing/measurements. 

RAM® Square Post Clamp Base for Posts 1.75" - 4" Wide - B Size
$57.99

Size Guide

Ball sizes
  • A Size 0.56" ball
  • B Size — this product 1" ball
  • C Size 1.5" ball
  • D Size 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
B — this product1" (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
D2.25" (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

B Size Double Socket Arms
See All
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