- Product type: Button Head Screw
- Manufacturer: ARRMA
- Manufacturer part number: AR721440
- Retailer part number: Z-AR721440
- EAN: 5052127008815
- Screw size: M4x40mm
- Thread type: Machine thread
- Head type: Button head
- Driver type: Hex
- Material: Steel
- Colour: Black
- Quantity per pack: 4 screws
- Compatibility: ARRMA 1/7 BIG ROCK 6S, ARRMA 1/7 FELONY 6S, ARRMA 1/7 FIRETEAM 6S, ARRMA 1/7 INFRACTION 6S, ARRMA 1/7 INFRACTION 6S AVC, ARRMA 1/7 LIMITLESS 120 8S AVC, ARRMA 1/7 LIMITLESS 6S, ARRMA 1/7 MOJAVE 6S, ARRMA 1/8 KRATON 6S, ARRMA 1/8 NOTORIOUS 6S, ARRMA 1/8 OUTCAST 6S, ARRMA 1/8 TALION 6S, ARRMA 1/8 TYPHON 6S
Overview
The ARRMA Button Head Screw 4x40mm (4) Z-AR721440 is an essential replacement and spare parts pack for RC enthusiasts maintaining their ARRMA vehicles. Whether you own a 1/7 scale Monster Truck, Desert Truck, Street Bash vehicle, or a 1/8 scale Buggy or Speed Truck, these precision-engineered fasteners are manufactured to exacting standards to ensure reliable performance during maintenance and assembly. These button head screws represent the same quality components used in ARRMA's factory builds, making them the ideal choice for anyone serious about keeping their RC car in peak condition.
When servicing your ARRMA RC vehicle, using genuine OEM hardware ensures that your model maintains its structural integrity and performance characteristics. These M4x40mm button head screws are compatible with a wide range of ARRMA models including the BIG ROCK 6S, FELONY 6S, FIRETEAM 6S, INFRACTION 6S, LIMITLESS models, MOJAVE 6S, KRATON 6S, NOTORIOUS 6S, OUTCAST 6S, TALION 6S, and TYPHON 6S, making them an indispensable spare for any serious RC car UK enthusiast. Each pack contains four screws, so you always have spares on hand when you need them.
Whether you're a weekend basher enjoying outdoor RC fun or a dedicated hobbyist performing regular maintenance on your brushless RC vehicle, having the correct replacement fasteners available is crucial. These button head screws feature precision-manufactured threads that ensure fast and easy installation without cross-threading or damage to the receiving component. The super-strong steel construction means these fasteners won't strip or fail under the stresses of high-performance RC driving.
Key Features
- Super-strong steel material — These button head screws are manufactured from high-quality steel that provides exceptional durability and longevity, ensuring they maintain their structural integrity through countless assembly and disassembly cycles during your RC car's lifetime.
- Precision-manufactured threads — The threads are engineered to exacting tolerances, which means you get smooth, effortless installation and removal without the risk of stripping, cross-threading, or damaging the threaded hole in your RC vehicle's chassis or components.
- Button head design — The distinctive button head profile provides a secure grip surface for your hex driver whilst keeping a low profile on the vehicle, which is essential for maintaining proper fitment and ensuring components sit flush against mounting surfaces.
- M4x40mm specifications — These fasteners are specifically sized at M4x40mm (4mm diameter shaft with 40mm length), making them suitable for a wide range of ARRMA model applications across different scales from 1/7 to 1/8 scale vehicles.
- Bagged in multiples of four — Each pack contains four screws, allowing you to always keep spares in your toolbox or pit bag, ensuring you're never caught without the correct fasteners when your RC vehicle needs maintenance or component replacement.
- Genuine ARRMA parts — These are OEM specification parts designed and approved by ARRMA, guaranteeing compatibility and performance that matches the factory standards of your vehicle.
Technical Performance
These button head screws represent a critical component of proper RC vehicle maintenance and assembly. The M4x40mm dimensions are carefully engineered to match the fastening requirements across ARRMA's extensive model range, from the powerful 1/7 scale brushless monsters like the BIG ROCK 6S and INFRACTION 6S through to the 1/8 scale high-performance buggies and speed trucks such as the KRATON 6S, TYPHON 6S, and NOTORIOUS 6S. The super-strong steel construction withstands the vibration, torque, and stress loads generated during aggressive RC driving, whilst the precision-manufactured machine threads ensure consistent engagement with threaded holes. The button head design provides superior ergonomics when using a hex driver for installation and removal, reducing the chance of slippage that could strip the fastener or damage the receiving component. Whether you're servicing your 6S brushless RC vehicle after a day's racing or performing routine maintenance on a weekend basher, these fasteners deliver the reliability and performance you expect from genuine ARRMA parts. The black finish resists corrosion and blends seamlessly with ARRMA's standard component aesthetics.
What's in the Box
- 4 x Button Head Screws – M4x40mm
Frequently Asked Questions
- What ARRMA RC models are these button head screws compatible with? — These M4x40mm button head screws are compatible with a wide range of ARRMA vehicles including the 1/7 scale BIG ROCK 6S, FELONY 6S, FIRETEAM 6S, INFRACTION 6S, INFRACTION 6S AVC, LIMITLESS 120 8S, LIMITLESS 6S, MOJAVE 6S, and 1/8 scale KRATON 6S, NOTORIOUS 6S, OUTCAST 6S, TALION 6S, and TYPHON 6S models, making them an excellent universal spare part for most ARRMA brushless RC vehicles.
- Are these genuine ARRMA parts? — Yes, these are OEM specification button head screws manufactured to ARRMA's exact standards and specifications. The manufacturer part number AR721440 identifies them as genuine ARRMA fasteners approved for use across their vehicle range.
- How many screws are in each pack? — Each pack contains four button head screws, providing you with replacements and spares to keep in your maintenance kit or spare parts collection.
- What size are these button head screws? — These fasteners are M4x40mm, meaning they have a 4mm diameter shaft and 40mm length. This specification makes them suitable for numerous ARRMA model applications across different scales.
- What material are these screws made from? — These button head screws are manufactured from super-strong steel that provides exceptional durability, corrosion resistance, and reliable performance through countless assembly and disassembly cycles.
- Will these screws work with my brushless RC truck? — If you own an ARRMA brushless RC vehicle such as the KRATON, OUTCAST, TALION, TYPHON, INFRACTION, LIMITLESS, MOJAVE, BIG ROCK, FELONY, or FIRETEAM models, these button head screws are the correct genuine replacement parts for maintenance and assembly.
- Why should I use genuine ARRMA parts instead of aftermarket fasteners? — Genuine OEM parts like these button head screws are engineered and tested to match your ARRMA vehicle's exact specifications, ensuring proper fitment, structural integrity, and performance. Using genuine parts protects your investment and maintains your RC car's reliability and resale value.
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 4x40mm (4) Z-AR721440 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.
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- 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.
