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631PCS M3 Hex Socket Screw Assortment Kit, M3 x 6/8/10/12/16/20mm - size: M3 631pcs 3

631PCS M3 Hex Socket Screw Assortment Kit, M3 x 6/8/10/12/16/20mm - size: M3 631pcs 3

$9.28 USD
$9.28 USD
Sale Sold out
Taxes included. Shipping calculated at checkout.

About this item

  • 1. GRADE 12.9 ULTRA HIGH TENSILE STRENGTH: Crafted from premium alloy steel, our M3 screws meet the 12.9 grade industrial standard, providing superior tensile strength and hardness compared to stainless steel or 8.8 grade bolts. They are engineered for high-stress applications where durability and reliability are non-negotiable.
  • 2. ADVANCED BLACK ZINC PLATED FINISH: Unlike common black oxide fasteners that may rub off or rust quickly, these screws feature a specialized Black Zinc Coating. This finish offers excellent corrosion resistance and a sleek, uniform black look, making them perfect for visible assemblies like PC builds and drone frames.
  • 3. ESSENTIAL 631-PIECE METRIC SET: This comprehensive assortment includes 210 screws in 6 frequently used lengths (6mm, 8mm, 10mm, 12mm, 16mm, 20mm), plus 210 matching hex nuts and 210 flat washers. To ensure immediate use, we’ve also included a precision Allen wrench in every box.
  • 4. PRECISION HEX SOCKET DRIVE: Designed with deep, standardized internal hex sockets, these cap screws provide a high-torque connection that resists stripping. The clean, burr-free threads ensure smooth engagement and a professional fastening experience for delicate electronics and heavy-duty machinery alike.
  • 5. LABELED STORAGE FOR QUICK ACCESS: All 631 pieces are organized in a heavy-duty, transparent storage case with secure snap-locks. A detailed size chart is printed on the lid, allowing you to identify the exact length you need in seconds, keeping your workspace organized and efficient.

Overview

  • Material: 12.9 Alloy Steel Black
  • Head Style: Socket
  • Item dimensions L x W x H: 7.48 x 3.94 x 0.67 inches
  • Exterior Finish: Black Zinc Plating
  • 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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