/* 统一前缀 hdiy-，避免样式冲突 */ .hdiy-product-wrap { margin: 0; padding: 0; } .hdiy-product-wrap h2, .hdiy-product-wrap h3 { margin-top: 1.5em; margin-bottom: 0.5em; font-weight: 600; } .hdiy-product-wrap p { margin-bottom: 1em; line-height: 1.5; } .hdiy-features-list { list-style: none; padding-left: 0; } .hdiy-features-list li { margin-bottom: 0.75em; padding-left: 1.5em; position: relative; line-height: 1.4; } .hdiy-features-list li::before { content: " "; position: absolute; left: 0; top: 0; } .hdiy-table-wrapper { overflow-x: auto; margin: 1.2em 0; } .hdiy-specs-table { width: 100%; border-collapse: collapse; font-size: 0.95rem; background: #fff; } .hdiy-specs-table th, .hdiy-specs-table td { border: 1px solid #ddd; padding: 10px 12px; text-align: left; vertical-align: top; } .hdiy-specs-table th { background-color: #f5f5f5; font-weight: 600; width: 35%; } .hdiy-faq-item { margin-bottom: 1.25rem; border-bottom: 1px solid #eee; padding-bottom: 0.75rem; } .hdiy-faq-question { font-weight: 700; margin-bottom: 0.35rem; font-size: 1rem; } .hdiy-faq-answer { margin-top: 0; line-height: 1.45; color: #2c2c2c; } @media (max-width: 640px) { .hdiy-specs-table th, .hdiy-specs-table td { padding: 8px 10px; } } 🔩 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 Solid brass construction (H59‑3) – Naturally corrosion‑resistant, non‑magnetic, and safe for sensitive electronics. No plating to chip or wear off. 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. Metric sizes M2, M2.5, M3, M4 – Covers the most common small diameters for electronics, jewelry boxes, model making, and instrument repair. 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. High strength and toughness – Good cold and hot working performance, plus excellent cutting properties for precise threading. Wide application range – Widely used in pins, screws, gaskets, hardware, pipe fittings, bearing retainers, and general DIY fastening. 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.
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