- Brand: ARRMA
- Model Number: Z-ARA727312
- Product Type: Screw Shaft
- Quantity: 2 pieces
- Thread Size: M3 (3mm)
- Length: 12.5mm
- Thread Type: Machine Thread
- Driver Type: 2.5mm Hex
- Material: Steel
- Colour: Black
- EAN: 5052127037716
- Compatible with ARRMA 1/10 BIG ROCK 223S DSC 4X4 RTR Brushless Monster Truck (Green, Black, Blue variants)
- Compatible with ARRMA 1/10 GRANITE 223S DSC 4X4 RTR Brushless Monster Truck (Red, Blue, Gun Metal variants)
- Compatible with ARRMA 1/10 KRATON 4X4 4S V2 BLX Speed Monster Truck RTR (standard and Green variants)
- Compatible with ARRMA 1/10 SENTON 223S BLX Brushless 4X4 Short Course Truck RTR with DSC (Blue/Purple, Yellow variants)
Overview
The ARRMA M3x12.5mm Screw Shaft is an essential replacement part for RC enthusiasts and serious hobbyists who demand reliability and precision in their machine. Whether you're a weekend basher running an RC monster truck in the UK or a competitor fine-tuning your brushless RC vehicle, these high-quality screw shafts are designed to keep your RC car performing at its best. As an original ARRMA component, this part is engineered to exact specifications and built to withstand the extreme conditions that come with high-performance RC driving.
These precision-engineered fasteners are not merely cosmetic upgrades—they are critical functional components that ensure your RC truck, buggy or short course vehicle operates smoothly and reliably. ARRMA's reputation for quality in the RC hobby market means you can trust these parts to deliver consistent performance, whether you're pushing your 1/10 scale brushless monster truck to its limits or maintaining a well-used RC platform. The M3x12.5mm specification makes this shaft compatible with several popular ARRMA models including the BIG ROCK 223S, GRANITE 223S, KRATON 4X4, and SENTON 223S families.
Choosing genuine ARRMA replacement parts is a smart investment in the longevity and performance of your RC vehicle. Rather than struggling with inferior aftermarket alternatives, these authentic screw shafts provide the reassurance that comes from using factory-approved components, ensuring perfect fitment and reliable operation every single time.
Key Features
- Strong Steel Construction — Manufactured from durable steel, these screw shafts are built to withstand the extreme stresses and vibrations encountered during aggressive RC driving, delivering long-lasting reliability whether you're bashing through rough terrain or racing on track.
- Precision Machine Thread — The precision-engineered thread ensures fast and easy servicing, allowing you to quickly disassemble and reassemble your RC vehicle without frustration, saving you valuable time during maintenance and upgrades.
- 2.5mm Hex Driver Fit — The standardised 2.5mm hex socket design ensures hassle-free installation and removal, compatible with common hex driver tools and allowing for quick swaps without fumbling with incompatible tools.
- Exact M3 x 12.5mm Specification — This metric sizing (3mm thread diameter, 12.5mm overall length) ensures perfect compatibility with ARRMA RC vehicles that require these dimensions, eliminating guesswork and potential fitment issues.
- Genuine ARRMA Component — As an authorised ARRMA part, these screw shafts are manufactured to the same exacting standards as original equipment, providing authentic replacement quality you can depend on.
- Black Finish — The professional black colour coating matches original ARRMA parts and resists corrosion, maintaining both aesthetic appeal and functional integrity over extended use.
Technical Performance
These M3x12.5mm screw shafts represent precision engineering at its finest, combining robust steel construction with meticulous dimensional tolerances to create fasteners that perform reliably in the demanding world of 1/10 scale RC vehicles. The machine thread design is optimised for the specific torque requirements of ARRMA's brushless monster trucks, short course trucks and speed platforms, ensuring that vibration and extreme driving conditions won't cause loosening or premature failure. The 2.5mm hex driver specification aligns with industry-standard tools, meaning you won't need to hunt for obscure hexagon keys when it comes time to service your RC truck. Whether you're working on a BIG ROCK 223S brushless monster truck, a GRANITE 223S with DSC transmission technology, the high-speed KRATON 4X4 4S V2 BLX, or the nimble SENTON 223S short course platform, these shafts deliver the precision fit and functional reliability that keeps your RC car performing lap after lap, run after run.
What's in the Box
- 2 x M3 x 12.5mm Screw Shaft
Frequently Asked Questions
- What ARRMA RC models use the M3x12.5mm screw shaft? — This part is compatible with several popular ARRMA brushless RC vehicles including the 1/10 BIG ROCK 223S DSC 4X4 RTR Brushless Monster Truck (available in Green, Black and Blue variants), the 1/10 GRANITE 223S DSC 4X4 RTR Brushless Monster Truck (available in Red, Blue and Gun Metal), the 1/10 KRATON 4X4 4S V2 BLX Speed Monster Truck RTR (including the Green variant), and the 1/10 SENTON 223S BLX Brushless 4X4 Short Course Truck RTR with DSC (available in Blue/Purple and Yellow variants). If you own any of these models, you'll want to keep spare M3x12.5mm shafts on hand.
- Why would I need replacement screw shafts for my RC truck? — In intensive RC use—whether bashing through rough terrain, racing on track, or practising tricks—fasteners can wear, become stripped or occasionally break. Having genuine ARRMA replacement shafts ensures you can quickly return your brushless RC vehicle to action without compromise, maintaining factory-spec performance and fit.
- Is this a difficult part to install? — No, installation is straightforward thanks to the standardised 2.5mm hex driver fit and precision machine thread. Most RC enthusiasts can swap these shafts in minutes using common hex tools, making maintenance quick and hassle-free.
- How many screw shafts come in this pack? — This pack contains 2 x M3x12.5mm Screw Shafts, providing a spare set or allowing you to replace multiple shafts on your RC vehicle during a comprehensive service or upgrade session.
- Are these genuine ARRMA parts? — Yes, these are authentic ARRMA replacement components manufactured to the same exacting standards as the parts supplied with your RC truck. Using genuine parts ensures perfect fitment, reliability and compatibility with your specific model.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the ARRMA M3x12.5mm Screw Shaft (2) Z-ARA727312 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
