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Description
RAM Tough Ball - C Series 1.5" - M12-1.75 x 12mm Threaded StudRAP 379U M1217512 RAM Tough Ball with M12 1. 75 x 12mm Threaded Stud (C Size) The RAP 379U M1217512 is a RAM Tough Ball with a 1. 5" C size rubber ball on an M12 1. 75 x 12mm stainless steel stud. The larger M12 thread suits heavier equipment and machinery with an M12 mounting hole, giving you a strong C size ball for any C size RAM double socket arm. Key Features M12 1. 75 x 12mm male thread for equipment with an M12 mounting hole 1. 5" C size rubber
RAP-379U-M1217512 – RAM® Tough-Ball™ with M12-1.75 x 12mm Threaded Stud (C Size)
The RAP-379U-M1217512 is a RAM® Tough-Ball™ with a 1.5" C-size rubber ball on an M12-1.75 x 12mm stainless steel stud. The larger M12 thread suits heavier equipment and machinery with an M12 mounting hole, giving you a strong C-size ball for any C-size RAM® double socket arm.
Key Features
- M12-1.75 x 12mm male thread for equipment with an M12 mounting hole
- 1.5" C-size rubber ball fits any C-size RAM® double socket arm for near-infinite adjustment
- Steel-reinforced, high-strength composite body for demanding use
- Backed by RAM Mounts' lifetime warranty
Specifications
- Thread: M12-1.75 x 12mm
- Ball size: 1.5" (C size)
- Material: high-strength composite with stainless steel thread
- Weight: 91 g (0.2 lb)
- Load rating: 1.81 kg (4 lb) standard use, 1.36 kg (3 lb) heavy-duty use
FAQs
What is the M12 stud used for?
It suits heavier equipment and machinery fitted with an M12-1.75 threaded hole at least 12mm deep.
Which RAM arms does it fit?
The 1.5" ball fits any C-size RAM® double socket arm and any C-size socket base.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Excellent value for money!
Size: 934W-Z, Color: Black, Size: 934W-Z, Color: Black
I absolutely love this office chair! I needed a chair that could support my standing desk without sacrificing comfort, and this one completely exceeded my expectations. It's incredibly sturdy and durable, well-made, and the height adjustment is super convenient, making it easy to find the perfect fit. Even during long hours of work, the seat is comfortable, and the ergonomic design effectively reduces pressure on my back and legs. I love its clean, modern look—it fits my home office perfectly. Assembly was quick and easy, and for this price, the quality is absolutely fantastic!
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Reviewed in the United States on February 24, 2026
★★★★★ 5
Perfect chair!
Size: 934-Z, Color: Blue, Size: 934-Z, Color: Blue
I have an adjustable-height desk (also purchased from Amazon) and needed a drafting chair for those times when my body gets tired of standing. This chair fits the bill and then some! I put it together myself; it took me about an hour, but would take me about half that next time, since now I know what to do (and what NOT to do!). All the parts were there; there are even spare parts (see photo). All the holes were drilled in exactly the right places, too, which isn't always the case when I buy things from Amazon (my standing desk is a great example). The chair fits me; I'm short (5'3.5"), and often the seats of furniture are too deep for me to rest my feet flat on the floor. The depth of the seat on this chair is just a little over 18 inches, and with the adjustable footrest ring, it's perfect. I don't think a tall or heavy person would fit in it, to be honest. But it's perfect for those of us who are vertically challenged. I love that it glides easily on my hardwood floors and that it turns 360 degrees. The chair comes in numerous luscious colors, so take your pick! It is very sturdy, has good lumbar support, and the seat and seat back are very comfortable. And the arms flip up, which was an absolute must when I was shopping for this chair. I got it on sale, too -- $109.00 -- and I'm delighted with this purchase.
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Reviewed in the United States on April 23, 2026
★★★★★ 5
Excellent adjustable drafting chair
Size: 934-Z, Color: Blue
Excellent chair design, extremely comfortable and exceptionally easy instructions to follow making for simple assembly. Love the amply wide cushioned seat and ergonomic backrest. The height adjustment feature works perfectly as well as positioning of the foot ring . Having the ability to raise the arms is also a big plus! I highly recommend this product for attractive appearance, comfort features, functionality and operation. Really nice chair!
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Reviewed in the United States on April 13, 2026
★★★★★ 4
Comfortable, stylish, and perfect for long work hours 💗✨
Size: 934-Z, Color: Pink
I bought this chair because I spend a lot of time working and needed something comfortable but also stylish, and I absolutely love it.
Since I started using it, I feel much better support in my back thanks to the lumbar support. It makes a big difference, especially during long work hours. The adjustable footrest is also a feature I didn’t know I needed, but now I use it all the time.
The flip-up armrests are very convenient because I can adjust them depending on what I’m doing or move them out of the way when needed.
The pink color is beautiful and adds a soft, elegant touch to my workspace. It looks great in a modern home office.
It feels sturdy, well-made, and very stable. Overall, it’s a great purchase that improved both my comfort and the look of my workspace.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
All-around thumbs up!
Size: 934W-Z, Color: Black
So far, so awesome. Easy to assemble, comfortable, arrived quickly and is exactly what I was looking for. I have a tall work bench in my new studio so I needed a chair that we could allow me to sit higher than a regular office chair and allow me to get off my feet after standing on the concrete floor. Plus its a nice looking chair that I am sure will last a long time. I love the flip-up arms and the lumbar support. This is just right!
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Reviewed in the United States on May 8, 2026
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