820Pcs Screw Assortment Kit, M2-M4 Stainless Steel Hex Button Cap Bolts - size: SS M2 M3 M4 820pcs 2
820Pcs Screw Assortment Kit, M2-M4 Stainless Steel Hex Button Cap Bolts - size: SS M2 M3 M4 820pcs 2
About this item
- 👨🔧【High Quality Material】 – Made of 100% 304 stainless steel, anti-rust and corrosion resistant for a long time use. With the finest manufacturing techniques, LuKaiSen screws and nuts sets have a smooth, burr-free surface. There are very sturdy, eco-friendly and use a long time.
- 👨🔧【Perfect Combination Set】 – There are a total of 820 pieces 304 stainless steel screws and nuts sets in 3 sizes: M2, M3, M4 with matching nuts, flat washers and spring washers meet different people’s demands. These sizes contain almost the 3 most commonly used sizes in our life, such as precision machinery, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc.
- 👨🔧【Convenient and Thickening Box】 - We want our customers to be simple and clear every time they use screws and nuts, so we put 27 types bolt, nut, flat washer, spring washer in 24 grids and each grid is marked with size label. We also provide three free relevant wrenches in our sets So you no longer need the extra purchase.
- 👨🔧【1:1 Matching Lock Washer】 – As we all know, nuts and flat washers increase the contact area and reduce stress to protect the screws and parts. And inside the LuKaiSen screws and nuts kit, we have added extra spring washers to prevent bolt loosening.
- 👨🔧【100% SATISFACTION GUARANTEE】 – Quality problems occur within 1 year replacement, lifetime warranty, if you're not completely satisfied, please feel free to CONTACT US and we will give you a 100% refund within 30 days of purchase. No questions asked!!
Overview
- Size: SS M2 M3 M4 820pcs 2
- Color: 820Pcs M2 M3 M4 Silver Hex Button Head
- Material: Stainless Steel 304
- Brand: LuKaiSen
- Item dimensions L x W x H: 7.5 x 5.5 x 1.7 inches
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Reviews
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⭐⭐⭐⭐⭐
Emily Carter — Seattle, Washington
The science kit was clearly organized and easy to follow. It made our weekend project feel enjoyable and gave us plenty of opportunities to explore each idea together.
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⭐⭐⭐⭐⭐
Daniel Brooks — Austin, Texas
I liked the variety of hands-on projects available at TinkerVanta. The kit we selected was engaging, practical, and well suited to a curious beginner.
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⭐⭐⭐⭐⭐
Lauren Mitchell — Denver, Colorado
The building project kept us interested from start to finish. The finished model was rewarding to complete, and the activity encouraged creative problem-solving along the way.
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⭐⭐⭐⭐⭐
Jason Reed — Portland, Oregon
Our electronics project was a fun introduction to circuits and basic engineering concepts. The hands-on format made the activity easier to understand and more memorable.
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FAQ
1. What types of products does TinkerVanta offer?
TinkerVanta offers science kits, engineering projects, robotics, electronics, building models, maker crafts, workshop supplies, and educational exploration activities for a variety of interests and skill levels.
2. Are your products suitable for all ages?
Recommended ages vary by product. Please review the age guidance, skill level, dimensions, included components, and safety information on each product page before ordering. Adult supervision may be required.
3. How do I choose the right kit?
Consider the user’s age, interests, experience, and preferred project type. Product descriptions provide information about contents, difficulty, assembly requirements, and recommended use to help you compare available options.
4. Are batteries, tools, or additional materials included?
Included components vary by product. Some projects may require batteries, household materials, tools, adhesives, or other supplies that are sold separately. Please check the individual product description before purchasing.
5. When will I receive my tracking number?
Tracking information is usually provided within 3–5 business days after an order is placed. During busy periods or when additional processing is needed, it may take up to 7–8 business days.
6. How long does delivery take after tracking is provided?
Delivery time depends on the carrier, destination, weather, and other transportation conditions. After tracking becomes available, delivery may require approximately 4–5 additional business days or longer in some circumstances.
7. Why is my tracking information not updating?
Carriers may need additional time to scan and update a shipment after the tracking number is created. Please allow a few business days for movement to appear. If there is still no update, contact us for assistance.
8. Can I change or cancel my order?
Contact us as soon as possible after placing your order. We will try to accommodate your request, but changes or cancellations cannot be guaranteed once processing or shipment preparation has begun.
9. What should I do if my order arrives damaged, defective, or incomplete?
Contact us promptly with your order number, a description of the issue, and clear photos of the product, packaging, and shipping label. We will review the information and explain the available resolution options.
10. How can I contact TinkerVanta?
Email us at zircorncirkne@gmail.com or call +1 (936) 260-5549. Please include your order number when contacting us about an existing purchase so we can assist you more efficiently.
Blog posts
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The Beginner’s Wiring Rescue: 7 Steps to Fix a ...
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The Beginner’s Wiring Rescue: 7 Steps to Fix a ...
Learn how to troubleshoot common wiring mistakes in beginner robotics and STEM kits with a systematic, hands-on approach. Discover how to trace circuits, check connections, diagnose motors, and turn failed...
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Why Your Beginner Robot Won’t Move: 7 Wiring Mi...
Is your beginner robotics kit not working? Learn how to troubleshoot common wiring mistakes, check power and polarity, inspect motors, and turn robot failures into valuable STEM learning opportunities.
Why Your Beginner Robot Won’t Move: 7 Wiring Mi...
Is your beginner robotics kit not working? Learn how to troubleshoot common wiring mistakes, check power and polarity, inspect motors, and turn robot failures into valuable STEM learning opportunities.
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How to Fix Beginner Robotics Kit Wiring Mistake...
Learn how to troubleshoot beginner robotics kit wiring mistakes without rebuilding the entire project. Discover practical STEM troubleshooting techniques for motors, power connections, polarity, and DIY robots.
How to Fix Beginner Robotics Kit Wiring Mistake...
Learn how to troubleshoot beginner robotics kit wiring mistakes without rebuilding the entire project. Discover practical STEM troubleshooting techniques for motors, power connections, polarity, and DIY robots.

















