- Part Number: Z-ARA723420
- Manufacturer: ARRMA
- Fastener Type: Cap Head Screw
- Thread Size: M4
- Length: 20mm
- Quantity per Pack: 4
- Head Type: Hexagonal Socket Cap Head
- Compatible With: ARRMA Outcast 8S 1/5 EXB, ARRMA 1/5 scale vehicles
- Application: Body mounting, roll cage attachment, roof rail securing
Overview
The ARRMA Cap Head Screw M4x20mm (4) Z-ARA723420 is an essential replacement fastener for serious RC enthusiasts and competitors who demand reliability and authenticity in their builds. Whether you're maintaining your RC car UK collection, restoring a brushless RC truck, or assembling replacement body panels, these precision-engineered cap head screws are the genuine OEM parts you need. ARRMA is recognised globally as a leader in high-performance RC vehicles, and maintaining that quality standard starts with using correct, authorised replacement components like these cap head screws.
This pack contains four M4x20mm cap head screws manufactured to ARRMA's exacting specifications for durability and fit. Cap head screws are the preferred fastening solution in RC applications where strength, reliability and ease of assembly are paramount. The M4x20mm sizing makes these screws ideal for body mounting, roll cage attachment, and other critical structural applications on ARRMA's 1/5 scale ready to run RC vehicles and competition-grade builds. If you're investing in quality RC equipment, you deserve quality replacement parts to match.
RC Model Shop stocks genuine ARRMA spares and accessories to support your RC hobby journey, whether you're a weekend basher exploring the thrills of RC fun or a dedicated competitor preparing for the next event. These cap head screws are specifically listed as required components for the ARRMA Outcast 8S 1/5 EXB bodyshell and other ARRMA models, ensuring perfect compatibility and performance with your existing setup.
Key Features
- Genuine OEM ARRMA Component — These screws are original equipment manufacturer parts designed and tested by ARRMA themselves, ensuring they meet the precise tolerances and materials specifications required for authentic performance and reliability in your RC vehicle.
- M4x20mm Cap Head Design — The cap head configuration provides excellent grip and leverage during installation and removal, making assembly and maintenance straightforward even in field conditions, while the substantial 20mm length accommodates multiple mounting layers typical in RC bodywork and chassis applications.
- Pack of Four — This convenient four-piece pack provides enough fasteners for typical body and roll cage mounting tasks on ARRMA 1/5 scale vehicles, or serves as ideal stock for the spare parts box of dedicated RC enthusiasts.
- Precision Engineering — ARRMA's manufacturing standards ensure consistent quality, proper threading, and durable finish across every screw in the pack, eliminating the frustration of stripped threads or broken fasteners during critical moments.
- Compatible with ARRMA 1/5 Models — These screws are specifically engineered for ARRMA's 1/5 scale ready to run RC trucks and buggies, including the popular Outcast 8S EXB platform, guaranteeing perfect fit and function.
Technical Performance
The M4x20mm cap head screw represents ARRMA's commitment to engineering excellence in every component of their RC vehicles. The M4 metric thread diameter (4 millimetres) combined with the 20mm overall length creates a fastener suitable for securing body panels, roll cages, roof rails, and other structural elements on high-performance 1/5 scale brushless RC vehicles. Cap head design—featuring a cylindrical head with a recessed hex socket—allows secure fastening without the fastener protruding visibly, maintaining the aesthetic integrity of finished RC bodywork whilst providing industrial-grade holding power. The four-screw quantity in this pack represents the typical requirement for body mounting applications on ARRMA's Outcast 8S and similar competition-grade RC trucks. ARRMA's quality control processes ensure that every screw meets ISO metric standards for thread pitch, head dimensions, and material strength, delivering the consistency expected from a leading manufacturer in the RC hobby. Whether you're replacing fasteners after aggressive off-road running, upgrading from lower-specification alternatives, or building a new RC setup from component parts, these genuine ARRMA cap head screws provide the durability and reliability essential for serious RC competition and recreational driving alike.
What's in the Box
- 4 x ARRMA Cap Head Screw M4x20mm
What You Need to Complete
These screws are replacement/spare parts designed for use with existing ARRMA RC vehicles or body assemblies. To utilise them, you'll need an appropriate RC chassis or body panel with matching M4 mounting holes. Consult your ARRMA vehicle manual or parts diagram to confirm compatibility with your specific model before ordering.
Frequently Asked Questions
- What ARRMA models use the M4x20mm cap head screw Z-ARA723420? — According to official ARRMA documentation, these screws are required for assembly of the ARRMA Outcast 8S 1/5 EXB pre-painted bodyshell (Z-ARA409009) and are compatible with related 1/5 scale ARRMA vehicles. Check your vehicle's parts diagram or contact us to confirm compatibility with your specific model.
- Are these genuine ARRMA parts or aftermarket alternatives? — These are genuine OEM ARRMA components manufactured to the brand's specifications. Using authorised ARRMA spares ensures proper fit, reliable performance, and maintains the integrity of your RC vehicle's construction and durability standards.
- What size tool do I need to install these screws? — The cap head design features a recessed hexagonal socket. You'll need an appropriately sized hex key (Allen key) matching the socket dimension—typically a 3mm hex key for M4 cap head screws, though we recommend checking your vehicle manual for the exact tool size.
- How many screws are in this pack and what are they used for? — This pack contains four M4x20mm cap head screws. On ARRMA 1/5 scale vehicles, they are typically used for mounting body panels, securing roll cages, attaching roof rails, and other structural fastening applications where secure, durable connections are essential.
- Can I use standard bolts instead of these cap head screws? — Whilst other fasteners might physically fit some applications, ARRMA engineers design their vehicles around specific screw types and specifications. Using genuine ARRMA cap head screws ensures optimal performance, maintains warranty coverage, and guarantees proper load distribution across your RC vehicle's structure.
- Is this a consumable item I should stock regularly? — Many serious RC enthusiasts maintain spare parts inventory including fasteners. If you drive your RC vehicles frequently or competitively, keeping backup packs of common screws like these prevents project delays when fasteners are lost or damaged during intense driving sessions.
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 Cap Head Screw, M4x20mm (4) Z-ARA723420 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.
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