- Part Number: Z-LOSA6206
- Manufacturer: Losi
- EAN: 660132005498
- Thread Size: 4-40
- Length: 3/8 inch
- Head Type: Socket Head
- Driver Type: Hex
- Quantity: 10 screws
Overview
The LOS Socket Head Screws, 4-40 x 3/8 inch (10) Z-LOSA6206 are essential fastening components manufactured by Losi, a trusted name in RC car UK hobby circles. These precision screws are designed for use across a wide range of Losi RC models and compatible platforms, making them an indispensable spare part for any RC enthusiast maintaining their vehicle collection. Whether you're a seasoned RC competitor or a weekend basher enjoying brushless RC cars and electric RC trucks, having quality replacement screws ensures your models remain securely assembled and ready for action.
Socket head screws are a critical component in RC vehicle assembly and repair. Unlike slotted or Phillips head fasteners, socket head screws feature a recessed hexagonal socket that provides superior grip and distributes force more evenly across the fastener head, reducing the risk of stripping or damaging the screw driver or the screw itself. This makes them ideal for precision RC work where reliability and repeatability matter.
This pack contains ten individual 4-40 x 3/8 inch socket head screws, giving you multiple replacement options or enough fasteners for complete rebuild projects. The 4-40 specification indicates a thread diameter of 4mm with 40 threads per inch, whilst the 3/8 inch length makes these screws suitable for numerous mounting applications throughout your RC model. With free mainland UK delivery on orders over £99 and the option of click and collect in store, purchasing spare parts for your RC hobby has never been more convenient.
Key Features
- Socket Head Design — The recessed hexagonal socket allows for precise tool engagement with minimal risk of cam-out or slipping, ensuring you can drive these screws with confidence without stripping either the fastener or your driver bit. This is particularly important when working on delicate RC components where over-tightening or fastener damage can compromise vehicle performance.
- 4-40 Thread Specification — With a 4mm thread diameter and 40 threads per inch, these screws offer the ideal balance between holding power and assembly ease for standard RC vehicle applications, making them compatible with the majority of Losi model platforms and many aftermarket RC components.
- 3/8 Inch Length — The 3/8 inch length provides versatility across multiple mounting points, from suspension arms and servo brackets to chassis plates and electronic component trays, making this a genuinely useful spare part for any RC car UK owner's workshop.
- Pack of 10 — Ten screws per pack means you have multiple replacements on hand, whether you've stripped a single fastener or need to perform a complete component rebuild. This quantity also allows you to keep spare screws in your field kit for maintenance during RC racing or bashing sessions.
- Losi Official Component — Manufactured by Losi, these are authentic OEM (Original Equipment Manufacturer) parts designed and engineered to the exact specifications required by Losi RC models, ensuring perfect fit and optimal performance.
- Hex Driver Type — The socket head design requires a hex (Allen key) driver, which is the industry standard for precision RC work and offers superior control and reliability compared to slotted fasteners.
Technical Performance
The 4-40 x 3/8 socket head screw represents precision engineering at a microscopic scale. With a thread pitch of 40 threads per inch, these fasteners offer fine-pitch threading that grips securely without excessive tightening force, a crucial characteristic when working with delicate composite and plastic materials common in modern RC vehicles. The socket head design distributes clamping force evenly across the component interface, preventing stress concentration that can lead to cracking or warping of mounting plates. The 3/8 inch length is precisely calculated to allow full engagement without bottoming out in threaded holes, a critical consideration in RC assembly where blind holes and precision tolerances are the norm. Built to Losi's exacting manufacturing standards, these screws exhibit consistent quality across the entire ten-piece pack, ensuring reliable performance whether you're maintaining a vintage RC model or working on the latest brushless RC technology. The material composition and finish resist corrosion, an important factor for RC vehicles that may be exposed to moisture during outdoor use or storage in damp conditions.
What's in the Box
- 10 x LOS Socket Head Screws, 4-40 x 3/8 inch
Frequently Asked Questions
- What size hex driver do I need for 4-40 socket head screws? — Standard 4-40 socket head screws typically require a 3/32 inch (2.4mm) hex driver. We recommend confirming the exact size with your specific Losi model documentation or testing with your hex key set before assembly, as precise fit is essential to avoid cam-out and fastener damage.
- Are these screws compatible with all Losi RC models? — The 4-40 x 3/8 inch specification is used across many Losi platforms, but compatibility varies by specific model. These screws are suitable for Losi vehicles that use this size fastener in their assembly, making them an excellent general-purpose spare part for any RC car UK collection. Consult your vehicle manual to confirm compatibility with your specific model.
- Why use socket head screws instead of Phillips head fasteners? — Socket head screws offer superior grip and reduced risk of stripping compared to Phillips or slotted alternatives. The hexagonal socket distributes force more evenly and provides better torque transfer, making them the preferred choice for precision RC work and competition-grade builds.
- Can I use these on other RC brands besides Losi? — The 4-40 x 3/8 inch specification is a standard fastener size used across the RC industry. Many aftermarket and compatible components from other manufacturers may use the same thread specification, though we recommend confirming compatibility before purchase. These Losi-branded screws are optimised for Losi vehicles but may work with other compatible platforms.
- How often should I replace socket head screws? — Socket head screws should be inspected regularly during RC maintenance routines. Replace any fasteners that show signs of stripping, corrosion, or damage. Building spare fasteners into your RC kit means you can perform maintenance without delays, keeping your vehicles ready for competition or weekend bashing 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 LOS Socket Head Screws, 4-40 x 3/8 inch (10) Z-LOSA6206 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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- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
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- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- 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.
