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Losi Button Head Screws 4-40 x 5/16 inch Pack of 10 Z-LOSA6245

Model No: Z-LOSA6245


COMING SOON 24/06/2026

Coming Soon - Stock Arriving: 24/06/2026

Stock Arriving: 24/06/2026

£4.99

£0.50

£4.49

Inc VAT

1 Year Warranty
We Accept
  • Manufacturer: Losi
  • Model Number: Z-LOSA6245
  • EAN Code: 660132012236
  • Thread Specification: 4-40
  • Length: 5/16 inch
  • Head Style: Button Head
  • Quantity per Pack: 10 screws
  • Type: Replacement fasteners for RC models

Overview

The Losi Button Head Screws 4-40 x 5/16 inch (Z-LOSA6245) are essential replacement fasteners designed for RC enthusiasts and hobbyists in the UK who need reliable, precision-engineered components for their models. Whether you're maintaining a Losi RC car, buggy, truck, or other scale models, these button head screws are critical spare parts that ensure your RC vehicle remains securely assembled and performs at its best. As an authorised Losi retailer serving the RC hobby community across the UK, we understand that having quality replacement parts on hand is fundamental to keeping your RC models in top condition.

Button head screws are a standard fastener used throughout modern RC vehicles, particularly in Losi models. The 4-40 thread specification and 5/16 inch length make these screws ideally suited for a variety of assembly applications on precision RC cars and trucks. This pack contains ten individual screws, providing you with enough spares to complete multiple repairs, upgrades, or maintenance tasks without needing to reorder immediately. For serious RC hobbyists in the UK who regularly bash, race, or compete with their models, keeping a stock of these genuine Losi screws ensures you're never caught short when a fastener needs replacing.

When you purchase RC components from RC Model Shop, you're choosing quality, authenticity, and expert support. These genuine Losi screws are manufactured to exact specifications and will fit perfectly with your Losi models and compatible RC vehicles. Whether you're a weekend basher enjoying RC adventures across UK terrain, a competitive racer preparing your car for the next event, or a dedicated hobbyist who maintains multiple models, having access to genuine replacement parts is crucial for long-term reliability and performance.

Key Features

  • Genuine Losi Manufacturing — These button head screws are manufactured by Losi, the trusted brand behind some of the most capable RC vehicles available to UK enthusiasts, ensuring compatibility and quality standards that meet the demands of serious RC hobbyists.
  • 4-40 Thread Specification — The 4-40 thread size is a standard specification used extensively throughout Losi RC models, making these screws perfectly suited for a wide range of assembly, repair, and upgrade applications on your vehicles.
  • 5/16 Inch Length — The specific length of 5/16 inch is engineered to work with the critical mounting points and assembly locations found throughout Losi RC cars, buggies, and trucks, ensuring proper engagement and secure fastening.
  • Button Head Design — The button head style provides a smooth, rounded top surface that sits flush and protects components beneath, whilst allowing easy access for tool-based removal and installation during maintenance or upgrades.
  • Pack of Ten Screws — This generous quantity of ten individual screws means you have multiple replacements available, making this an economical choice for RC hobbyists who want to maintain a spare parts inventory without purchasing excessive quantities.
  • Reliable Fastening — These precision-engineered screws provide secure, dependable fastening for critical assembly points throughout your Losi models, giving you confidence that your RC vehicle will remain properly assembled during intense driving sessions.

Technical Performance

The Losi Button Head Screws represent the quality of fastening engineering that RC enthusiasts in the UK have come to expect from the Losi brand. These are not generic commodity screws; they are precision-manufactured components engineered to exact specifications that match the requirements of Losi RC vehicles. The 4-40 thread designation refers to a #4 screw with 40 threads per inch, a standard specification across professional RC manufacturing. The 5/16 inch length has been carefully calculated to provide optimal engagement with the threaded holes and mounting points found throughout Losi RC models, whether you're working with 1/10 scale buggies, trucks, or other platform variants. The button head design offers practical benefits during assembly and maintenance: the smooth, rounded profile prevents sharp edges from damaging surrounding components, whilst the head diameter provides adequate surface area for secure tool engagement without slipping or stripping. For RC enthusiasts who take their hobby seriously—whether competing in UK RC racing events, bashing through challenging terrain, or maintaining a collection of models—having access to genuine replacement screws ensures that you can quickly address fastener issues without compromising build quality or vehicle safety.

What's in the Box

  • 10x Losi Button Head Screws, 4-40 x 5/16 inch

Frequently Asked Questions

  • What are button head screws used for in RC models? — Button head screws are precision fasteners used throughout RC vehicles for assembling critical components. Their rounded head design provides secure fastening while protecting delicate components, making them ideal for use in suspension mounts, servo fixtures, battery boxes, and drivetrain assemblies across Losi RC cars and trucks.
  • Will these 4-40 x 5/16 screws fit my Losi RC model? — These screws are designed specifically for Losi models and use the 4-40 thread specification that is standard across Losi's product range. The 5/16 inch length is engineered for the typical mounting depth found throughout Losi RC vehicles, making these screws an excellent choice for repairs and upgrades on your Losi car or truck.
  • Why should I buy genuine Losi replacement screws instead of generic alternatives? — Genuine Losi screws are manufactured to exact specifications using materials and tolerances that guarantee proper fit and function with your Losi models. Generic screws may have slightly different dimensions, thread pitch, or material hardness that can result in poor fitment, stripped threads, or reduced reliability during demanding RC sessions.
  • How many screws should I order for my RC maintenance kit? — This pack of ten screws provides a practical quantity for ongoing maintenance and repairs. Many RC enthusiasts in the UK order multiple packs to maintain a comprehensive spare parts inventory, especially if they own several Losi models or participate in regular racing and bashing activities.
  • Are these button head screws suitable for competitive RC racing? — Yes, these genuine Losi screws meet the quality and reliability standards required for competitive RC racing. Racers depend on secure fastening throughout their vehicles to maintain consistent performance, and these precision-engineered screws provide the dependability that competition demands.

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 Button Head Screws, 4-40 x 5/16 inch (10) Z-LOSA6245 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.
  • Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
  • Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
  • 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.
  • We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
  • As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
  • 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.