RAM® Add-A-Ball™ Accessory Ball for C Size Socket Arms

Name: RAM® Add-A-Ball™ Accessory Ball for C Size Socket Arms
Brand: RAM Mounts
SKU: RAM-B-273-CU
Price: 8.77 USD
Availability: InStock
Rating: 4.4 (5 reviews)

RAM® Add-A-Ball™ Accessory Ball for C Size Socket Arms - Main image

RAM® Add-A-Ball™ Accessory Ball for C Size Socket Arms - View 2

RAM® Add-A-Ball™ Accessory Ball for C Size Socket Arms - View 3

$8.77 ~~$13.49~~ In stock

Category: Components

The RAM® Add-A-Ball™ Accessory Ball for C Size Socket Arms (RAM-B-273-CU) allows you to connect another device to your existing C-size RAM® Mount. This ball is made up of a 1" ball connecting to a 5/16"-18 threaded stud that replaces the bolt in any Short or Medium C-size socket arm, and the ball connects to the middle of the socket arm on the opposite side of the tightening knob. If you are looking to mount more than one device but cannot locate multiple mounting points, this base is the ideal accessory for connecting both devices off of one mounting base.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.4 / 5 · 5 reviews)

Evelyn ★★★★★ Oct 22, 2026

Put this on my existing C-size socket arm and now I can mount my phone and GPS at the same time. The 1-inch ball clicked right into place and feels solid. Exactly the modular fix I needed for my setup.

John ★★★★★ Oct 20, 2026

I needed an extra mount point for my GPS and this ball screwed right into my existing setup without any wobble. The 1" ball fits perfectly with the C-size socket arms I already had.

Timothy ★★★★☆ Oct 23, 2026

Got my second device mounted without swapping arms. The 1" ball fits the socket snugly and the whole thing feels solid once tightened. Only wish the kit included the tightening tool, but my existing one worked fine.