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RAM® 1/2" NPT Female Threaded Hole with Ball

Part #: RAM-218-1U UPC: 793442021817

Features

.5" NPT female thread connects to any .5" NPT male thread
Included C size 1.5" RAM® rubber ball allows for connection to any C 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

Product Information
Overview	The RAM-218-1U consists of a 1.5" ball and 0.5" NPT female thread. This part connects to any 0.5" NPT male thread, including RAM-PA82xx rigid arm series mounts.

Specifications
thread pitch	1/2" NPT
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	0.22 lb

RAM® 1/2" NPT Female Threaded Hole with Ball

Name: RAM® 1/2" NPT Female Threaded Hole with Ball
Brand: RAM Mounts
SKU: RAM-218-1U
Price: 23.99 USD
Availability: InStock

Part#: RAM-218-1U

UPC: 793442021817

$23.99

Options

RAM® 9" Long 1/2" NPT Male Threaded Pipe

$37.49

Overview

The RAM-218-1U consists of a 1.5" ball and 0.5" NPT female thread. This part connects to any 0.5" NPT male thread, including RAM-PA82xx rigid arm series mounts.

Features

.5" NPT female thread connects to any .5" NPT male thread
Included C size 1.5" RAM® rubber ball allows for connection to any C 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

thread pitch:

1/2" NPT

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:

0.22 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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Documents

Knowledge Base: Ball Sizes

QUESTIONS & ANSWERS

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Is the .5" thread form tapered or straight?

The female thread in the RAM-218-1U is tapered.

RAM® 1/2" NPT Female Threaded Hole with Ball

$23.99

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.