Spektrum SPM Avian Prop Adapter 42mm RC Aircraft Propeller Adapter E-SPMXAMA4906

• Brand: Spektrum
• Model Number: E-SPMXAMA4906
• Product Type: Propeller Adapter
• Overall Diameter: 42mm
• Overall Length: 1.48" (38mm)
• Shaft Diameter: 0.3125" (8mm)
• Shaft Length: 1.18" (30mm)
• Thread Specification: 5/16" -24
• Intended Use: RC Aircraft propeller attachment for brushless motors
• Compatibility: Brushless motors with 8mm shaft diameter and 5/16" -24 thread

Overview

The SPM Avian Prop Adapter 42mm (E-SPMXAMA4906) is a precision-engineered propeller adapter designed for RC aircraft enthusiasts across the UK who demand reliable, high-quality components for their electric-powered models. Manufactured by Spektrum, a recognised leader in spread spectrum technology and RC components, this adapter represents the gold standard for connecting propellers to your RC aircraft's motor shaft with confidence and precision. Whether you're flying ready-to-run RC aircraft, building competition-grade models, or maintaining your existing fleet, this prop adapter delivers the secure fit and durability you need for safe, consistent flight performance.

This 42mm prop adapter is engineered for aircraft that require a robust, dependable connection between the motor shaft and propeller assembly. The adapter's precision manufacturing ensures that your propeller remains securely fastened during flight, eliminating vibration and the risk of mid-air separation — critical concerns for any serious RC pilot. If you're building a custom RC aeroplane, upgrading components on an existing model, or simply replacing worn adapters, the SPM Avian Prop Adapter is the trusted choice recommended by RC enthusiasts and professionals throughout the UK.

Spektrum's reputation for quality extends to every component they manufacture, and this prop adapter is no exception. The precision threading and engineered dimensions ensure compatibility with standard motor shafts and propeller hubs, making it an essential upgrade or replacement part for your RC aircraft collection.

Key Features

• 42mm Diameter Design — The 42mm overall diameter provides an optimal interface for standard RC aircraft propeller hubs, ensuring a secure mechanical fit that resists loosening during high-vibration flight conditions, which is essential for maintaining flight stability and safety.
• Precision Thread Specification — Equipped with a 5/16" -24 thread, this adapter matches the standard motor shaft threading found on quality brushless motors used in RC aircraft, allowing you to confidently connect your propeller without worrying about thread compatibility or stripping.
• Compact Shaft Length — With a shaft length of just 1.18" (30mm), this adapter is engineered to provide adequate thread engagement for secure fastening whilst remaining compact enough for modern RC aircraft designs where space is at a premium.
• Lightweight Construction — The minimal overall length of 1.48" (38mm) and precision engineering ensure that weight is kept to an absolute minimum, preserving your aircraft's performance characteristics and reducing the rotational mass on your motor shaft.
• Small Diameter Shaft — The 0.3125" (8mm) shaft diameter is the standard specification for many popular brushless motors used in RC aircraft, making this adapter a universal solution for numerous models and motor manufacturers.
• Spektrum Quality Assurance — As an official Spektrum component, this adapter is manufactured to exacting standards with quality control processes that ensure consistency and reliability across every unit produced.

Technical Performance

The SPM Avian Prop Adapter 42mm represents Spektrum's commitment to precision manufacturing in RC aircraft components. Every dimension has been engineered for optimal performance: the 0.3125" (8mm) diameter shaft interfaces perfectly with standard brushless motor shafts found in modern RC aircraft, whilst the 5/16" -24 thread specification ensures secure engagement with both standard and precision propeller hubs. The overall length of 1.48" (38mm) and shaft length of 1.18" (30mm) have been calculated to provide sufficient thread engagement for a secure connection without unnecessary bulk or weight penalty. This adapter is constructed from materials selected for their durability and resistance to the stresses imposed by propeller rotation and vibration. The precision machining ensures concentricity and balance, critical factors in reducing vibration that could compromise your aircraft's control and structural integrity. Whether you're operating a high-performance electric RC aeroplane, a sport flyer, or a scale model, this adapter will provide reliable, repeatable performance across hundreds of flight hours. The compact design makes it suitable for installation in aircraft with limited nose space, whilst the robust construction ensures it withstands the forces generated by modern brushless motors driving large-diameter propellers at high RPM.

What's in the Box

• SPM Avian Prop Adapter 42mm (E-SPMXAMA4906) — 1x unit

Frequently Asked Questions

• What is the SPM Avian Prop Adapter 42mm designed for? — This adapter is specifically designed to connect propellers to brushless motor shafts in RC aircraft. The 42mm diameter, 0.3125" (8mm) shaft diameter, and 5/16" -24 thread specification make it compatible with standard motor shafts found in quality brushless motors used throughout the RC aircraft hobby in the UK and worldwide.
• Will this adapter fit my motor? — The SPM Avian Prop Adapter 42mm is compatible with brushless motors featuring a 0.3125" (8mm) shaft diameter and 5/16" -24 thread. Before purchasing, verify your motor's shaft diameter and thread specification. If your motor uses these standard specifications, this adapter will provide a secure, precision fit.
• Is this suitable for high-performance RC aircraft? — Absolutely. This adapter is engineered to Spektrum's professional standards and is suitable for any RC aircraft application, from casual park flyers to competition-grade models. The precision construction ensures minimal vibration and maximum reliability, making it ideal for any serious RC enthusiast.
• What makes this better than generic prop adapters? — Spektrum adapters are manufactured with precision engineering and rigorous quality control processes. The dimensional accuracy ensures a perfect fit, reducing vibration and the risk of propeller separation — critical safety considerations. Generic adapters often have loose tolerances that can compromise flight safety and performance. Choosing a Spektrum component means choosing a product from a recognised leader in RC technology.
• How do I install the SPM Avian Prop Adapter? — Installation is straightforward: thread the adapter onto your motor shaft (ensuring the thread is clean), then attach your propeller hub to the 42mm diameter end. Use a propeller lock nut or safety mechanism to secure the propeller, and ensure the assembly is tight before flight. Always verify security before each flight.
• Is this a replacement part or does it come with other components? — This is the adapter only. It does not include a propeller, motor, or propeller lock nut. You will need to pair this adapter with your existing brushless motor and your chosen propeller assembly.

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 SPM Avian Prop Adapter 42mm E-SPMXAMA4906 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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