🔩 Product Overview: Solid Brass Hex Socket Countersunk Screws (M3–M12)
Need a fastener that combines strength, corrosion resistance, and a clean flush finish? These solid brass hex socket (Allen drive) countersunk flat head machine screws deliver exactly that. Made from high‑quality brass, they offer excellent electrical conductivity, thermal conductivity, and natural corrosion resistance – making them ideal for electronics, architectural trim, furniture, and automotive interiors. The internal hex drive lets you apply serious torque without slipping, while the 90° flat head sinks flush for a smooth, snag‑free surface. Available in metric sizes from M3 all the way up to M12 and lengths from 8mm to 50mm, these GooBetter bolts are perfect for any project where steel would rust or cause magnetic interference.
✨ Why Solid Brass Hex Socket Countersunk Screws Are a Versatile Choice
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Solid brass construction – Naturally corrosion‑resistant, non‑magnetic, and safe for sensitive electronics. No plating to chip or wear off. Offers good electrical and thermal conductivity.
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Hex socket (Allen) drive – Internal hex drive provides positive engagement, eliminates cam‑out, and allows higher torque without stripping the recess. Perfect for power tools and high‑vibration assemblies.
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Countersunk flat head – Sits flush with the surface for a professional, seamless finish. Ideal for furniture, panels, and architectural applications where protruding heads are not acceptable.
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Wide size range: M3, M4, M5, M6, M8, M10, M12 – From small electronics and appliances up to heavy‑duty machinery and structural fastening.
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Lengths from 8mm to 50mm (including head) – Short screws for thin panels, longer ones for through‑hole applications. Choose exactly what your project needs.
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Brand: GooBetter, made in China – Consistent quality and thread accuracy. Fully threaded metric coarse pitch (M3x0.5, M4x0.7, M5x0.8, M6x1.0, M8x1.25, M10x1.5, M12x1.75).
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Wide application range – Used in electronic equipment, furniture manufacturing, machinery maintenance, architectural decoration, automotive interiors, and more.
📏 Technical Specifications – Brass Hex Socket Countersunk Screws (M3–M12)
| Specification |
Details |
| Brand |
GooBetter |
| MPN |
Does not apply |
| Material |
Solid brass |
| Product Type |
Hex socket countersunk flat head machine screws (Allen drive) |
| Drive Style |
Hex key (internal hex socket) |
| Head Style |
Countersunk / Flat head (90° typical) |
| System of Measurement |
Metric |
| Thread Sizes (Diameter) |
M3, M4, M5, M6, M8, M10, M12 |
| Thread Pitch (coarse) |
M3x0.5, M4x0.7, M5x0.8, M6x1.0, M8x1.25, M10x1.5, M12x1.75 |
| Thread Type |
Fully threaded |
| Length Range |
8mm to 50mm (length includes the head – total screw length) |
| Number in Pack |
Varies – select from product options |
| Note |
Dimensions may have tolerances; actual product dimensions are decisive |
❓ FAQs – Brass Hex Socket Countersunk Screws
🔸 What makes brass better than steel for some applications?
Brass is non‑magnetic, naturally corrosion‑resistant, and electrically conductive. It won't rust or interfere with sensitive electronics. It also has a warm golden appearance that looks great on visible hardware. For environments with moisture or where magnetism is a concern, brass is often the superior choice.
🔸 Are these screws fully threaded? How is length measured?
Yes – they are fully threaded from under the head to the tip. Length is measured including the head (total screw length) – standard for countersunk screws. For example, an M6 x 20mm screw is 20mm long overall from top of the flat head to the tip.
🔸 What hex key (Allen wrench) size do I need for each screw diameter?
Standard hex socket sizes for countersunk screws: M3 uses 2mm, M4 uses 2.5mm, M5 uses 3mm, M6 uses 4mm, M8 uses 5mm, M10 uses 6mm, M12 uses 8mm. A quality metric hex key set will cover all these.
🔸 Will brass screws corrode in outdoor or marine environments?
Brass has good corrosion resistance for most indoor and sheltered outdoor use. In direct saltwater or industrial chemical environments, it can develop a patina or verdigris over time. For harsh marine use, 316 stainless or silicon bronze are better. For general outdoor furniture, architectural trim, and moderate humidity, brass performs well.
🔸 Can I use these screws with nuts, or are they self‑tapping?
These are machine screws – they are designed to be used with a matching metric nut or screwed into a pre‑tapped hole. They are not self‑tapping. For best results, pair them with brass or stainless steel nuts.
🔸 What lengths are available for each diameter?
Lengths range from 8mm to 50mm depending on the diameter. Please select your size and length from the dropdown options on the product page. Note that not every length may be available for every diameter – check the listing for specifics.
🔸 Are these screws electrically conductive?
Yes – brass is a good electrical conductor. These screws can be used for grounding connections, terminal blocks, and other applications where conductivity is required. However, they are not as conductive as copper – for high‑current applications, pure copper fasteners would be better.
