FTX Button Head Hex Screw M4 20mm Fastener FTX9656

Overview

The FTX Button Head Hex Screw M4 X 20mm is an essential fastening component designed for RC enthusiasts across the UK who maintain and upgrade their radio-controlled models. Whether you're a dedicated RC car UK hobbyist, a weekend basher, or someone who enjoys building and customising ready to run RC vehicles, having the correct replacement fasteners is crucial for keeping your model in peak condition. This precision-engineered screw is manufactured to exacting standards by FTX, a trusted name in the RC community, and represents the kind of quality component that separates a well-maintained model from one that suffers from loose connections and potential component failure.

Button head hex screws are favoured in RC applications because their distinctive low-profile, rounded head design sits flush or nearly flush with surfaces, reducing snagging and providing a cleaner aesthetic finish. The M4 X 20mm specification makes this particular screw ideal for numerous assembly and repair tasks across the extensive FTX model range, from rock crawlers and off-road buggies to desert racers and other high-performance platforms. If you're running an FTX model and need to replace worn, damaged, or stripped fasteners, or if you're undertaking a complete rebuild or upgrade project, this screw should be in your spares box.

For anyone serious about maintaining their RC investment, investing in genuine OEM (original equipment manufacturer) fasteners like these is a sensible choice. Using the correct specification ensures proper fit, adequate clamping force, and reliability when your model is in action. Whether you're planning a gentle crawler session or pushing your RC to its limits on a UK track, you can trust that this component has been designed specifically for FTX models and will perform as intended.

Key Features

• Button Head Design — The rounded, low-profile head of this screw reduces the risk of catching on obstacles or snagging on surrounding components during assembly, disassembly, or operation, making it both practical and protective for your model.
• Hex Socket Configuration — The internal hex socket accepts standard hex key tools, providing secure engagement and reducing the likelihood of stripping the fastener during installation or removal, which is essential for longevity and reliability.
• M4 Diameter Specification — This 4mm metric diameter is a common size across many FTX models, making it a versatile fastener that will find uses in multiple areas of your RC collection and during various maintenance tasks.
• 20mm Length — The 20mm length is precisely calculated to provide adequate threading engagement without excessive protrusion, ensuring proper assembly depth and maintaining the structural integrity of your model components.
• Genuine FTX Manufacturing — Being an official FTX component, this screw meets the exact specifications required by the manufacturer, ensuring compatibility and performance across the complete range of FTX RC models and platforms.
• Pack Quantity — Available as individual fasteners, allowing you to purchase exactly what you need for your specific repair or build project without waste or unnecessary expense.

Technical Performance

The FTX Button Head Hex Screw M4 X 20mm represents precision manufacturing in fastening technology. The M4 designation indicates a 4mm nominal diameter conforming to ISO metric screw standards, whilst the 20mm length provides optimal engagement and clamping capability for FTX assembly applications. The button head design, rather than a traditional countersunk or pan head, offers several performance advantages: the rounded profile reduces stress concentration points that could lead to material failure, whilst the low overall height minimises potential interference with adjacent components or obstacles during normal operation. The hex socket configuration provides superior torque transfer compared to Phillips or slot-head alternatives, reducing cam-out incidents and the associated risk of fastener damage. In the demanding environment of RC operation—where models experience vibration, shock loads, and frequent assembly and disassembly cycles—using correct OEM fasteners ensures that your repairs remain secure and your modifications maintain structural integrity. These screws are manufactured to precise tolerances, ensuring consistent fit across all FTX platforms and compatibility with standard metric hex key tools. The material composition and heat treatment process employed by FTX ensure adequate strength whilst maintaining corrosion resistance, important for models that might encounter damp conditions during UK outdoor play or training sessions.

What's in the Box

• FTX Button Head Hex Screw M4 X 20mm (quantity as specified)

Frequently Asked Questions

• What FTX models use the M4 X 20mm button head hex screw? — This fastener is confirmed compatible with the FTX DR8 1/8 Desert Racer 6S RTR, available in both Red and Blue variants. However, as a standard metric size, it will find application across numerous other FTX platforms including rock crawlers, buggies, and various other models that utilise M4 fastening points in their assembly specifications.
• Is this a genuine OEM part from FTX? — Yes, this is an authentic FTX manufactured component, designed and produced to the exact specifications required for FTX models. Using genuine fasteners ensures compatibility, reliability, and peace of mind that your repair or upgrade will meet manufacturer standards.
• Can I use this screw to replace stripped fasteners in my RC model? — Absolutely. If you've stripped or damaged an M4 X 20mm fastener during maintenance, this replacement screw will restore your model to full functionality. However, if the threaded hole itself is damaged, you may need to re-tap the hole to the next size up or use a helicoil insert to restore threading.
• What tools do I need to install this screw? — You'll need a hex key (Allen key) of the appropriate size to fit the socket head. The exact hex key size should be specified in your FTX model manual or can be determined by fitting—typically M4 button head screws use a 3mm hex key, but always verify with your specific model documentation.
• How many screws should I purchase? — This depends entirely on your needs. If you're replacing a single damaged fastener, one screw may suffice. For a complete rebuild, professional maintenance, or creating a spare parts kit for your RC car UK hobby, you may wish to purchase several to ensure you always have replacements available when needed.
• Why choose a button head design over other screw types? — Button head screws offer several advantages in RC applications: the low-profile rounded head reduces snagging and catching on obstacles, the design provides excellent strength-to-weight ratio, the hex socket provides superior grip compared to Phillips heads, and the aesthetic finish looks cleaner on visible assemblies.

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 FTX Button Head Hex Screw M4 X 20mm FTX9656 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.