- Manufacturer: ARRMA
- Part Number: Z-ARA721850
- EAN: 5052127038683
- Screw Type: Button Head
- Size: M8x50mm
- Driver Type: Hex Socket
- Thread Type: Machine Thread
- Colour: Black
- Pack Contents: 4 screws
- Compatible Models: ARRMA 1/5 Kraton 4X4 8S BLX EXB Brushless Monster Truck (C-ARA5808V2T1)
Overview
The ARRMA Button Head Screw M8x50mm (4) Z-ARA721850 is an essential replacement and upgrade component for RC enthusiasts who operate ARRMA 1/5 scale models and other compatible RC vehicles. Whether you're a seasoned basher maintaining your fleet or a dedicated racer looking to refresh your hardware, these precision-engineered fasteners are built to withstand the demands of high-performance RC driving. ARRMA is a recognised leader in the RC hobby, and their genuine spare parts are engineered to the same exacting standards as their award-winning vehicles.
These button head screws are specifically designed for the ARRMA 1/5 Kraton 4X4 8S BLX EXB Brushless Monster Truck and other compatible models. Button head screws offer a distinctly different advantage compared to standard socket head caps or countersunk fasteners—they provide a low-profile rounded top that resists catching on obstacles during high-speed runs through rough terrain. For RC car UK enthusiasts who demand reliability and authenticity, genuine ARRMA spare parts are the only choice that guarantees perfect fitment and long-term durability.
This pack contains four individual M8x50mm screws finished in black, each featuring a hex socket driver for precise tightening with the correct Allen key. Having spare fasteners on hand is essential for any serious RC hobbyist, as fasteners can loosen during intense driving sessions or may need replacement after a heavy crash or maintenance repair.
Key Features
- M8x50mm Specification — These screws are precisely sized at M8 diameter with a 50mm total length, ensuring they fit exactly where ARRMA engineers intended without any modification or adaptation required.
- Button Head Design — The rounded button head profile sits low against mounting surfaces, minimising snag points and reducing the risk of catching during aggressive off-road driving over rocks, roots and obstacles.
- Hex Socket Driver — Each screw features a hex socket cavity, allowing you to use a standard Allen key or hex wrench for secure, repeatable tightening without the risk of stripping the fastener head.
- Machine Thread Construction — These are genuine machine thread screws with precision-cut threads that engage cleanly with threaded inserts or nuts, providing strong, reliable holding power that resists vibration loosening.
- Black Finish — The black powder-coated finish protects against rust and corrosion whilst maintaining a professional appearance consistent with ARRMA's quality standards.
- Pack of Four — This convenient four-pack ensures you have sufficient fasteners for multiple repairs, replacements or assembly tasks without needing to purchase multiple packs.
- Genuine ARRMA Component — As an official ARRMA spare part, these screws are manufactured to exact OEM specifications, guaranteeing compatibility and reliability with your RC monster truck or compatible model.
Technical Performance
The ARRMA Button Head Screw M8x50mm represents precision engineering optimised for the unique demands of high-performance RC vehicles. The M8 diameter provides substantial holding power for critical assembly points on large-scale RC models, whilst the 50mm length ensures adequate engagement with threaded components. The machine thread profile—as opposed to wood screw or sheet metal screw designs—ensures clean thread engagement with precision-machined inserts and nuts, eliminating the risk of thread stripping that can occur with less precise fastening systems. The hex socket drive mechanism, also known as an Allen socket, provides superior torque transfer compared to Phillips or slot drives, allowing builders to apply consistent tightening force without cam-out damage. The black finish is applied through industrial processes that protect against the moisture, salt spray and UV exposure encountered during outdoor RC driving sessions. These fasteners are particularly important for the ARRMA 1/5 Kraton 4X4 8S BLX EXB, which combines extreme brushless power with a tough composite chassis that relies on precision fasteners to maintain structural integrity under acceleration, braking and cornering loads that would exceed 2G in real-world driving.
What's in the Box
- 4x ARRMA Button Head Screw M8x50mm with hex socket drive
Frequently Asked Questions
- Are these genuine ARRMA button head screws for RC vehicles UK-compatible? — Yes, these are genuine ARRMA spare parts manufactured to exact OEM specifications. They are fully compatible with ARRMA 1/5 scale models sold throughout the UK and work perfectly with models available from authorised retailers across the country.
- What vehicles are these button head screws compatible with? — These M8x50mm button head screws are specifically listed as compatible with the ARRMA 1/5 Kraton 4X4 8S BLX EXB Brushless Monster Truck (part number C-ARA5808V2T1). However, they may fit other ARRMA models and compatible vehicles that use M8x50mm threaded fastening points—always verify against your vehicle's assembly manual before installation.
- Why should I choose button head screws instead of socket head cap screws? — Button head screws feature a distinctly lower-profile rounded top compared to the taller, squared-off socket head cap design. This minimises snagging during off-road driving and reduces the chance of the fastener catching on obstacles or undergrowth, which is particularly important when bashing through rough terrain at high speed.
- How do I install these button head screws? — These screws feature a hex socket drive, which means you'll need an appropriately-sized hex Allen key or wrench to tighten them. Always use the correct size wrench to avoid stripping the socket, and tighten firmly but not excessively—snug them down until secure without over-torquing, which could damage threads or crack component mounting points.
- Why buy genuine ARRMA spare parts instead of generic alternatives? — Genuine ARRMA fasteners are manufactured to exact OEM specifications, ensuring perfect fitment and reliability. Generic or aftermarket fasteners may have slightly different thread pitches, dimensions or material properties that could affect reliability, increase vibration loosening, or compromise the structural integrity of critical assembly points on your RC vehicle.
- How many screws do I get in this pack? — This convenient pack contains four M8x50mm button head screws, providing sufficient fasteners for multiple repairs, complete assembly tasks or keeping spares on hand for future maintenance and repairs.
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 Button Head Screw M8x50mm (4) Z-ARA721850 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:
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