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450Pcs Black M3 Phillips Flat Head Machine Screws and Nuts Kit - size: 450Pcs M3*4/6/8/10/12/16/20mm-Flat

450Pcs Black M3 Phillips Flat Head Machine Screws and Nuts Kit - size: 450Pcs M3*4/6/8/10/12/16/20mm-Flat

$8.28 USD
$8.28 USD
Sale Sold out
Taxes included. Shipping calculated at checkout.

About this item

  • 1. PREMIUM 4.8 GRADE CARBON STEEL: Manufactured from high-quality 4.8 grade carbon steel, these M3 screws offer reliable strength and durability for everyday fastening tasks. The professional black oxide finish provides enhanced corrosion resistance while offering a sleek, non-reflective aesthetic that blends perfectly with black equipment or furniture.
  • 2. COUNTERSUNK FLAT HEAD DESIGN: Featuring a classic flat head (countersunk) design, these screws are engineered to sit flush with or below the surface once installed. This ensures a smooth, snag-free finish, making them the ideal choice for cabinetry, electronic enclosures, and precision DIY projects where appearance matters.
  • 3. COMPREHENSIVE M3 METRIC SET: This 450-piece hardware kit includes 7 popular lengths of M3 screws (4mm, 6mm, 8mm, 10mm, 12mm, 16mm, 20mm) and 200 matching M3 hex nuts. Whether you are repairing a household appliance or building a 3D printer, you’ll always have the right size at your fingertips.
  • 4. PRECISION PHILLIPS DRIVE: Designed with a standard Phillips (cross) drive, these bolts are easy to install with common screwdrivers, reducing the risk of cam-out or stripping. The deep, clean threads ensure a tight grip and stable fastening in various materials, from plastic to thin metal sheets.
  • 5. ORGANIZED STORAGE & SIZE LABELED: All components are neatly organized in a heavy-duty, transparent storage case with individual compartments. A clear size chart is included on the lid for quick identification, saving you time and preventing the frustration of mixing different sizes during your work.

Overview

  • Material: 4.8 Grade Carbon Steel
  • Head Style: Flat
  • Item dimensions L x W x H: 7.48 x 3.94 x 0.67 inches
  • Exterior Finish: Black Oxide
  • Thread Size: M3

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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