M6 M8 M10 M12 Grade 10.9 Black Countersunk Hex Machine Screws
M6 M8 M10 M12 Grade 10.9 Black Countersunk Hex Machine Screws
Details
JARBLUE M6–M12 Black Grade 10.9 Countersunk Hex Socket Machine Screws
Upgrade your fastening projects with these premium Grade 10.9 Carbon Steel Flat Head Countersunk Machine Screws from JARBLUE. Available in sizes M6, M8, M10, and M12, these hex socket cap screws deliver exceptional tensile strength and a flush, clean finish — ideal for demanding mechanical assemblies, fabrication work, and DIY projects where a low-profile head is required.
Key Features
- Grade 10.9 Carbon Steel — High-strength alloy construction for superior durability and torque resistance
- Flat Countersunk Head — Sits flush with the surface for a clean, professional look and reduced snag points
- Hex Socket Drive — Allows precise tightening with an Allen/hex key, even in tight or recessed spaces
- Black Oxide Finish — Provides corrosion resistance and a sleek, uniform appearance
- Multiple Size Options — Available in M6, M8, M10, and M12 thread diameters to suit a wide range of applications
- Quantity Packs of 1–10 pcs — Flexible ordering to match your exact project needs
- CE Certified — Meets quality and safety standards for peace of mind
Specifications
| Brand | JARBLUE |
| Material | Carbon Steel |
| Grade | 10.9 (High Tensile) |
| Head Style | Flat / Countersunk |
| Drive Style | Hex Socket (Allen Key) |
| Thread Sizes | M6, M8, M10, M12 |
| Finish | Black Oxide |
| Certification | CE |
| Country of Origin | Made in Mainland China |
Common Applications
- Machinery and mechanical assemblies
- Automotive fabrication and chassis work
- Metal fabrication and structural projects
- Furniture and cabinetry hardware
- General DIY and home improvement tasks
Related Products You May Also Like
- 10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips
- 10pcs 2-Pin Spring Wire Connectors – Quick Splice Lock Terminals
- 10pcs Durable Gold Blade Nut Metal Universal Trimmer Accessories
Learn more: OSHA guidance on hand and power tools
Frequently Asked Questions
Q: What sizes are available for these Grade 10.9 countersunk machine screws?
A: These JARBLUE countersunk hex socket screws are available in M6, M8, M10, and M12 thread diameters, with pack quantities ranging from 1 to 10 pieces so you can order exactly what you need for your project.
Q: What tool do I need to drive these flat head machine screws?
A: These screws feature a hex socket (Allen/hex key) drive style. You will need the appropriate metric Allen key or hex bit that matches the socket size for your selected thread diameter (M6, M8, M10, or M12).
Q: Are these screws suitable for outdoor or high-stress applications?
A: Yes. The Grade 10.9 carbon steel construction offers high tensile strength suitable for demanding mechanical and structural applications. The black oxide finish adds a layer of corrosion resistance, though for prolonged outdoor exposure in wet environments, additional protective coating may be recommended.
Q: What does the flat countersunk head style mean?
A: A flat countersunk head sits flush with or below the surface of the material when installed in a countersunk hole, creating a smooth, snag-free surface. This is ideal for applications where a low-profile, clean finish is required.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.
Materials + Care
We prioritize quality in selecting the materials for our items, choosing premium fabrics and finishings that ensure durability, comfort, and timeless appeal.
Shipping + Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.