High-strength construction
12.9 grade carbon steel delivers exceptional tensile strength for demanding fastening jobs.
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- 14-day easy returns
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Why customers love it
Strength and precision for every fastening project
This hex socket cap screw assortment kit brings together 12.9 grade carbon steel, a black zinc finish, and a full range of metric sizes for reliable repairs, furniture assembly, and 3D printer maintenance.
- 12.9 grade carbon steel for exceptional tensile strength
- Black zinc finish resists rust and wear
- Hex socket drive installs securely with standard Allen keys
- Metric sizes M2 to M6 cover a wide range of fastening needs
- Matching hex nuts and washers complete each fastening set
- RoHS certified for environmentally safe materials
Why you'll appreciate this kit
Built to resist wear
The black zinc finish provides enhanced resistance to rust and wear, extending the life of each screw.
Easy, secure installation
The hex socket drive works with standard Allen keys for a secure and straightforward fit.
Complete fastening sets
Matching hex nuts and washers are included, so you have everything needed for a full assembly.
Specs
The details that matter
Built to last outdoors, season after season.
- Material
- 12.9 grade carbon steel
- Finish
- Black zinc
- Sizes
- M2, M2.5, M3, M4, M5, M6
- Drive type
- Hex socket
- Head style
- Round
Comparison
How it compares
Not all products in this category are built the same.
Feature
SmartPicksWorld
Typical alternative
Steel grade
12.9 grade carbon steel
Lower-grade steel
Finish
Black zinc for rust and wear resistance
Basic finish
Drive type
Hex socket for secure Allen key installation
Slotted or Phillips
Size range
M2 to M6 metric sizes
Limited sizes
Kit contents
Includes matching hex nuts and washers
Screws only
Our worry-free shopping promise
If your order arrives damaged, defective, or not as described, contact us within 14 days and we will make it right with a replacement or refund.
Frequently asked questions
Everything you might want to know before you order.
What material are these screws made from?
These screws are made from 12.9 grade carbon steel with a black zinc finish, offering strength and corrosion resistance.
What sizes are included in this kit?
The kit includes metric sizes M2, M2.5, M3, M4, M5, and M6 to cover a variety of fastening needs.
What tools do I need for installation?
The hex socket drive is designed for secure installation with standard Allen keys.
Does the kit include nuts and washers?
Yes, the kit comes with matching hex nuts and washers for complete fastening sets.
Is this product environmentally safe?
Yes, the kit is RoHS certified, ensuring environmentally safe materials.
Shipping & returns
Shipping
- Delivers to United States (based on your selected country/region).
- Estimated delivery: 3–15 business days after dispatch.
- Shipping cost: Free.
Returns
You can request a return within 14 days after delivery. Standard returns have a €4.00 EUR (approximately $4.66 USD) flat-rate return shipping fee, deducted from your refund. Return shipping is free for items that arrived damaged, defective, or incorrect. Items should be unused and in original packaging where possible. Contact us before sending anything back.