- Brand: Losi
- Part Number: Z-LOSA6308
- EAN: 660132614881
- Nut Type: Locking
- Thread Size: 4-40
- Nut Profile: 1/2
- Material: Steel
- Pack Contents: 10 nuts
- Recommended For: Losi JRXS and compatible Losi RC models
Overview
The Losi Steel Locking 1/2 Nuts in 4-40 size are essential replacement fasteners for maintaining and servicing your Losi RC models. Whether you're upgrading your RC car UK setup, performing routine maintenance on your RC vehicle, or building custom configurations, these precision-engineered steel locking nuts provide the secure fastening you need to keep your model running reliably. Designed specifically for Losi JRXS and other Losi platforms, these nuts ensure that critical components stay firmly in place during aggressive driving, racing, and off-road bashings.
As an RC hobbyist in the UK, you'll appreciate the importance of quality fasteners when it comes to reliability and performance. These steel locking nuts are manufactured to exacting standards by Losi, a recognised leader in RC vehicle engineering and design. Each pack contains ten nuts, giving you multiple replacements for repairs, upgrades, or spare parts stockpiling. The locking mechanism prevents vibration-induced loosening, a common issue in RC vehicles that experience constant acceleration, deceleration, and rough terrain impacts.
Whether you're involved in competitive racing, weekend bashing, or casual RC car driving, having the correct replacement parts on hand is essential for keeping your models in peak condition. These 4-40 steel locking nuts are compatible with a wide range of Losi RC models and are the type of precision component that separates well-maintained, reliable vehicles from those plagued by loose fasteners and mechanical failures.
Key Features
- Steel Construction — Made from hardened steel, these nuts provide superior durability and strength compared to alternative materials, ensuring they won't strip, crack, or degrade even under the vibration and stress experienced during intense RC driving sessions.
- Locking Mechanism — The integrated locking feature prevents the nuts from vibrating loose during operation, which is critical in RC vehicles where constant acceleration, cornering, and impacts create significant mechanical stress that can loosen standard fasteners.
- 4-40 Thread Size — Specifically engineered to the 4-40 thread specification used on many Losi RC components, ensuring perfect compatibility and a secure fit that won't require modifications or workarounds.
- 1/2 Nut Profile — The half-nut design provides the specific geometry required for Losi applications, fitting perfectly into the designated fastening points on your RC model without interference or binding.
- Pack of Ten — Ten nuts per pack means you have multiple spares for repairs, replacements, or upgrades across multiple areas of your RC vehicle or across different models in your collection.
- OEM Losi Component — As an official Losi spare part, you're purchasing genuine engineered components that meet the exact specifications and quality standards that Losi RC vehicles are designed and tested with.
Technical Performance
These steel locking 1/2 nuts represent the type of precision fastening solution that professional RC racers and dedicated hobbyists rely upon for maintaining their vehicles. The steel material provides superior hardness and wear resistance compared to plastic or softer metal alternatives, preventing the thread stripping that can occur with repeated assembly and disassembly cycles during maintenance and repairs. The locking mechanism is engineering by Losi to withstand the vibration environment typical of RC vehicles — where suspension articulation, motor vibration, and impact forces constantly work to loosen conventional fasteners. The 4-40 thread specification is a standard used throughout compact RC applications, and the 1/2 nut profile matches Losi's design standards precisely. With ten nuts per pack, you have the ability to replace fasteners across multiple assembly points or maintain a stock of spares for future maintenance needs. This attention to fastener quality is what separates reliable, well-maintained RC cars UK from vehicles that experience chronic mechanical issues.
What's in the Box
- Losi Steel Locking 1/2 Nuts, 4-40 (10)
Frequently Asked Questions
- What is a locking nut and why do I need it for my RC car? — A locking nut incorporates a locking mechanism that prevents it from vibrating loose during operation. In RC vehicles, which experience constant vibration from the motor, suspension movement, and terrain impacts, standard fasteners can gradually loosen over time, potentially leading to component failure or loss. Locking nuts eliminate this issue, ensuring that critical components remain securely fastened throughout driving sessions and over many uses.
- Will these nuts fit my Losi RC model? — The 4-40 size is compatible with many Losi RC platforms, particularly the JRXS and similar compact models. The 1/2 nut profile is engineered to Losi specifications. If you're unsure whether these are the correct size for your specific model, we recommend checking your vehicle's parts diagram or contacting our team of experienced RC enthusiasts.
- How often should I replace these fasteners? — With proper use and maintenance, Losi steel locking nuts are designed to last for many seasons. However, if you notice a nut has become stripped, damaged, or won't hold tight, it should be replaced immediately to prevent further damage to the surrounding components. Having a spare pack on hand means you're never caught without the right replacement parts.
- What is the difference between these steel locking nuts and standard nuts? — Steel locking nuts feature a specialised locking mechanism (typically a nylon insert or deformed thread profile) that resists vibration-induced loosening, whereas standard nuts rely only on the friction of the thread itself and can gradually work loose in high-vibration environments like RC vehicles. The steel construction in these nuts also provides superior durability and thread integrity compared to alternative materials.
- Can I use these nuts on other RC models or vehicles? — These nuts are manufactured to Losi specifications, and whilst they may be mechanically compatible with other RC brands that use 4-40 fasteners, we recommend using manufacturer-specific fasteners for optimal fit and function. Losi components are engineered and tested specifically with Losi vehicles in mind.
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 LOS Steel Locking 1/2 Nuts, 4-40 (10) Z-LOSA6308 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.
