Fastrax 24T Aluminium Servo Horn for HiTec Servos Black FAST312B

Overview

The Fastrax 24T Aluminium Servo Horn (HiTec) FAST312B is a premium upgrade component designed for RC enthusiasts looking to enhance the durability and reliability of their steering and throttle assemblies. Whether you're running a crawler, buggy, truck, or any other RC car UK model equipped with a HiTec servo, this heavy-duty servo arm offers a significant step up from standard plastic alternatives. Built from precision-machined aluminium and finished with tough black anodising, this servo horn is engineered to withstand the demanding forces encountered in serious RC racing, bashing, and off-road driving.

For RC hobbyists in the UK who demand performance and longevity, servo upgrades are one of the most cost-effective improvements you can make. The standard plastic servo horns that come with most servos are prone to stripping, cracking, and breaking under load—particularly if you're driving through challenging terrain or pushing your RC vehicle to its limits. By upgrading to the Fastrax 24T Aluminium Servo Horn, you're investing in a component that will give you years of reliable service and peace of mind knowing your steering and throttle control won't let you down when you need it most.

This servo arm comes complete with the necessary hardware and is ready to install, making it an accessible upgrade for both beginners and experienced RC enthusiasts. The 24-tooth spline configuration ensures compatibility with HiTec servo units, and the additional screw clamping system provides extra strength and security compared to single-point mounting solutions.

Key Features

• Machined Aluminium Construction — This servo horn is manufactured from solid aluminium rather than plastic, which provides exceptional strength-to-weight ratio and exceptional durability for demanding RC applications. Aluminium resists cracking and stripping far better than plastic, meaning your servo arm will maintain its integrity through thousands of cycles of steering input and throttle control.
• Black Anodised Finish — The black anodising process creates a hard, protective oxide layer on the aluminium surface that resists corrosion, abrasion, and UV damage. This finish not only looks professional and allows your RC car to stand out visually, but also extends the lifespan of the component by protecting against environmental wear and weathering.
• 24-Tooth Spline Configuration — The 24T spline size is specifically designed to fit HiTec servo units, ensuring perfect compatibility and secure engagement. This tooth count provides excellent torque transfer while maintaining a practical arm length suitable for most RC steering and throttle applications.
• Heavy-Duty Screw Clamping System — Unlike basic single-point mounting, this servo arm features additional screw clamping that locks the arm firmly onto the servo spline shaft. This dual-point attachment system dramatically increases load capacity and prevents the arm from slipping or rotating under extreme steering or throttle inputs, a common failure point with standard horns.
• Complete Hardware Package — Every servo horn arrives with all the hardware you need for installation, including a precision-engineered screw and an aluminium countersunk washer. This means you can install the component immediately without searching for replacement fixings, saving time and frustration.
• Fixed Mounting Option — This is a fixed servo horn rather than a servo saver type, providing direct mechanical linkage to your steering or throttle mechanism. This design offers maximum responsiveness and control, making it ideal for precision driving in crawling, racing, or off-road scenarios where every input needs to translate immediately to vehicle movement.

Technical Performance

The Fastrax 24T Aluminium Servo Horn represents a significant engineering upgrade over plastic alternatives commonly found on ready to run RC cars and buggies. Built from precision-machined aluminium, this component offers a material strength advantage that translates directly to improved durability and performance. The engineering philosophy behind this design prioritises reliability under load; the screw clamping system eliminates the single point of failure present in standard snap-on servo horns, distributing stress across multiple contact points. The black anodised finish provides both aesthetic appeal and functional protection, with the hard oxide layer protecting the underlying aluminium from oxidation and mechanical wear. The 24-tooth spline specification ensures compatibility with HiTec servo units whilst providing optimal torque delivery for steering and throttle applications. Whether you're running this servo arm on a crawler tackling steep inclines, a buggy blasting through jumps, or a truck navigating rough terrain, the aluminium construction will handle the cumulative stress of thousands of control inputs without fatigue or failure. The included aluminium countersunk washer works in harmony with the clamping screw to distribute forces evenly across the mounting point, further protecting the servo spline from damage.

What's in the Box

• Fastrax 24T Aluminium Servo Horn (HiTec compatible)
• Mounting screw
• Aluminium countersunk washer

Frequently Asked Questions

• Will this servo horn fit my HiTec servo? — Yes, this servo horn is specifically designed for HiTec servo units with a 24-tooth spline configuration. Before purchasing, verify that your HiTec servo has a 24T spline; if you're unsure, check your servo documentation or contact our team at RC Model Shop and we'll help you identify the correct spline size for your setup.
• How does this compare to the plastic servo horn that came with my servo? — The Fastrax aluminium servo horn is dramatically more durable than standard plastic horns. Whilst plastic horns can crack, strip, or flex under heavy loading, this machined aluminium arm maintains its structural integrity through intensive use. The screw clamping system also provides superior security compared to simple snap-on designs, preventing slippage during demanding driving conditions.
• Is this servo horn suitable for beginners? — Absolutely. This is an excellent upgrade for beginners because it removes one of the most common failure points in RC vehicles—the plastic servo horn. By upgrading early, you'll spend more time driving and less time troubleshooting servo failures, which accelerates your learning and enjoyment of the hobby.
• What type of RC vehicles can I use this on? — This servo horn is compatible with any RC car, truck, buggy, or crawler that uses a HiTec servo with a 24-tooth spline. Common applications include steering assemblies on off-road buggies, rock crawlers, short course trucks, and monster trucks, as well as throttle control linkages on various vehicle types.
• Do I need any special tools to install this servo horn? — Installation is straightforward and requires only basic RC tools—typically a hex wrench or screwdriver that fits the mounting screw. The servo horn simply slides onto the servo spline and is secured with the included clamping screw. Most RC enthusiasts can complete installation in under five minutes.
• Can I use this with servo savers? — This is a fixed servo horn design, meaning it mounts directly to the servo without a servo saver mechanism. If your setup requires a servo saver for protection, you would need to install one between the horn and your control linkage, or consider a servo saver-compatible servo horn variant.

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 FASTRAX 24T ALUMINIUM SERVO HORN (HITEC) FAST312B 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.