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820Pcs Screw Assortment Kit, M2-M4 304 SS Black Hex Button Cap Bolts - size: M2 M3 M4 820pcs 2

820Pcs Screw Assortment Kit, M2-M4 304 SS Black Hex Button Cap Bolts - size: M2 M3 M4 820pcs 2

$14.91 USD
$14.91 USD
Sale Sold out
Taxes included. Shipping calculated at checkout.

About this item

  • PREMIUM 304 STAINLESS & BLACK FINISH: Stop compromising between durability and aesthetics. Unlike common alloy steel black screws that rust easily, LUKAISEN combines high-grade 304 stainless steel with a sleek black coating. Perfect for professional-looking projects that require long-term corrosion resistance in humid environments.
  • COMPREHENSIVE 820PCS METRIC KIT: One box to solve all your fastening needs. This assortment includes M2, M3, and M4 button head socket cap screws in various lengths, along with matching nuts, flat washers, and spring washers. Total 820 pieces ensure you always have the right size for RC cars, 3D printers, or drone repairs.
  • REINFORCED HEX SOCKET DRIVE: Say goodbye to stripped heads. Our screws are precision-machined with deep hex sockets to ensure a secure fit with your Allen wrench. The button head design provides a wider bearing surface and a low-profile, clean finish for your most delicate DIY electronics or furniture projects.
  • ORGANIZED & CLEARLY LABELED CASE: No more mixed-up hardware. All 820 components are housed in a heavy-duty, partitioned storage box. Each compartment features a high-contrast size chart on the lid, allowing you to identify M2, M3, and M4 sizes instantly, even in low-light workshop conditions.
  • VERSATILE SCENARIO APPLICATION: Designed for the modern maker. Whether you are building a custom matte-black PC case, maintaining an RC crawler, or fixing household appliances, these black oxide finish screws blend perfectly with dark-colored equipment while providing the structural integrity you trust.

Overview

  • Material: 304 Stainless Steel Black
  • Head Style: Button
  • Item dimensions L x W x H: 7.48 x 3.94 x 0.67 inches
  • Exterior Finish: Black Oxide
  • Thread Size: M2 M3 M4

Low stock: 10 left

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Reviews

  • ⭐⭐⭐⭐⭐

    Hannah Miller — Seattle, Washington
    I ordered several science activity supplies for projects at home. The product descriptions made it easier to compare the available options, and everything fit neatly into our learning space. Stemora made finding tools for hands-on activities feel simple and organized.

  • ⭐⭐⭐⭐⭐

    Daniel Foster — Austin, Texas
    I found a useful selection of electronics and robotics accessories for a beginner project. It was convenient to browse related components in clearly organized categories. I would consider shopping here again when planning another maker activity.

  • ⭐⭐⭐⭐⭐

    Lauren Bennett — Denver, Colorado
    The measurement and observation tools I selected worked well for the classroom activities I had planned. I especially appreciated being able to review the product details before ordering and choose items that matched the lesson requirements.

  • ⭐⭐⭐⭐⭐

    Jason Parker — Portland, Oregon
    I purchased a few storage items and small tools for organizing my maker workspace. The products helped keep components, wires, and project materials easier to sort and access. The overall shopping experience was straightforward and convenient.

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FAQ

What types of products does Stemora offer?


Stemora offers supplies for science experiments, microscopy, biology learning, measurement, laboratory organization, electronics, robotics, coding education, 3D printing, maker projects, and classroom activities. Available products and specifications may change over time.

Are Stemora products suitable for children?


Recommended ages vary by product. Please review the product description, manufacturer guidance, included warnings, and required skill level before purchasing. Products containing small parts, tools, electrical components, glass, or chemicals may not be suitable for young children.

Is adult supervision required?


Adult supervision is recommended for children and students, especially when using electrical components, sharp tools, heated equipment, glassware, small parts, or experiment materials. Customers are responsible for following all product instructions and safety precautions.

Can these products be used at home and in classrooms?


Many products may be suitable for classrooms, home learning, science projects, maker spaces, and hobby activities. Suitability depends on the specific product, learning environment, user experience, and intended activity.

How can I check what is included with a product?


Please review the product title, description, specifications, images, package quantity, and included-components section before ordering. Items shown for demonstration or scale in product images may not always be included.

How do I know whether an electronic or robotics part is compatible?


Check the listed dimensions, voltage, connector type, board compatibility, operating requirements, and supported platforms. Compatibility is not guaranteed unless it is specifically stated on the product page. Contact us before ordering if you need clarification.

When will I receive tracking information?


Tracking information is generally provided within 3–5 business days after an order is confirmed. In some cases, processing may take approximately 7–8 business days. Delivery may require an additional 4–5 business days after tracking becomes available, depending on the carrier and destination.

Why did my order arrive in separate packages?


Products in the same order may be shipped from different fulfillment locations. As a result, items may arrive separately and have different tracking numbers. You will not be charged additional shipping fees solely because an order is divided into multiple packages.

Can I change or cancel my order?


Contact us as soon as possible at vaioamaonaoak@gmail.com. We will try to assist, but changes or cancellations cannot be guaranteed once an order has entered processing or has been shipped.

What should I do if an item arrives damaged, defective, or incorrect?


Contact us promptly at vaioamaonaoak@gmail.com with your order number, a description of the issue, and clear photographs of the item, packaging, and shipping label. Please retain the product and original packaging while we review your request. Eligibility and available resolutions are subject to our Return & Refund Policy.

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