🔩 Product Overview: Brass Phillips Countersunk Flat Head Screws (M2–M4)
Whether you're restoring antique furniture, building a marine instrument, or just need a screw that won't rust or interfere with magnets, these solid brass Phillips flat head machine screws are a reliable choice. Available in M2, M2.5, M3, and M4 metric diameters, they're fully threaded and feature a standard 82° countersunk head that sits flush with the surface – perfect for woodworking, decorative hardware, electrical terminals, and any project where a smooth, snag‑free finish matters. The H59‑3 brass alloy offers good corrosion resistance, high strength, excellent machinability, and a classic golden look that develops a beautiful patina over time.
✨ Why Brass Countersunk Phillips Screws Deserve a Spot in Your Workshop
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Solid brass construction (H59‑3) – Naturally corrosion‑resistant, non‑magnetic, and safe for sensitive electronics. No plating to chip or wear off.
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Phillips drive with flat countersunk head – The cross recess centers your driver, and the 82° flat head sinks flush into a countersunk hole. Leaves a smooth, snag‑free surface.
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Metric sizes M2, M2.5, M3, M4 – Covers the most common small diameters for electronics, jewelry boxes, model making, and instrument repair.
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Fully threaded, GB standard coarse pitch – Threads run the entire length. Standard metric threads (M2x0.4, M2.5x0.45, M3x0.5, M4x0.7) for reliable engagement with nuts or tapped holes.
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High strength and toughness – Good cold and hot working performance, plus excellent cutting properties for precise threading.
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Wide application range – Widely used in pins, screws, gaskets, hardware, pipe fittings, bearing retainers, and general DIY fastening.
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Safety and environmental protection – Brass is non‑toxic and recyclable, making it a responsible choice for indoor and outdoor projects.
📏 Technical Specifications – Brass Countersunk Phillips Screws (M2–M4)
| Specification |
Details |
| Product Type |
Phillips Countersunk Flat Head Machine Screws |
| Material |
Brass (H59‑3 alloy) |
| Drive Style |
Phillips cross‑head |
| Head Style |
Flat / Countersunk (82° typical) |
| System of Measurement |
Metric |
| Screw Sizes (Diameter) |
M2, M2.5, M3, M4 |
| Thread Pitch (coarse) |
M2x0.4, M2.5x0.45, M3x0.5, M4x0.7 |
| Thread Type |
Fully threaded (full length from under head to tip) |
| Length Measurement |
Length includes the head (total screw length) – see product options for specific lengths |
| Standard |
GB |
| Grade |
Grade 5 (comparable strength) |
| Finish |
None (natural brass, unplated) |
❓ FAQs – Brass Countersunk Phillips Screws (M2–M4)
🔸 Are these screws fully threaded? How is length measured?
Yes – they are fully threaded from just under the head to the tip. Length is measured including the head (total screw length) – standard for countersunk screws. For example, an M3 x 8mm screw is 8mm long overall from top of the flat head to the tip.
🔸 Will brass screws rust or corrode?
Brass does not rust like steel. It can develop a darker patina or slight greenish tint (verdigris) over many years in damp conditions, but this is a surface change that doesn't weaken the screw. For indoor use, they'll stay golden for a long time. For sheltered outdoor use, they outperform plain steel but aren't as corrosion‑resistant as stainless – best for decorative or low‑moisture exterior work.
🔸 What Phillips screwdriver size do I need for M2 through M4?
M2 and M2.5: use PH0 or PH00 (PH0 is best). M3: use PH0 or PH1. M4: use PH1. Using the correct size prevents stripping – a precision screwdriver set is recommended for the smallest sizes.
🔸 Can I use these screws in wood, plastic, or metal?
These are machine screws – best used with a matching nut or into a pre‑tapped metal hole. For wood or soft plastic, drill a pilot hole and use them as wood screws; the full thread will grip well. For best results in soft materials, consider adding a threaded insert or using a nut on the back side.
🔸 Do these screws come with nuts or washers?
They are sold as screws only. However, M2–M4 brass or stainless steel nuts and washers are available separately. For a flush countersunk finish, you don't need a washer – the flat head itself sits flush in a tapered hole.
🔸 Are these screws magnetic? Will they interfere with electronics?
Brass is completely non‑magnetic. That's one of the main reasons to choose them over steel – perfect for sensitive electronic equipment, MRI rooms, compass housings, or any application where stray magnetism is a problem.
