🔩 Product Overview: #2-56 Countersunk Phillips Machine Screws – UNC 1/4" Length, Nickel Plated Carbon Steel
Need a tiny, precision fastener for American standard threads? These #2-56 (2-56 UNC) countersunk flat head Phillips machine screws are exactly what you're looking for. With a 1/4 inch length, they are ideal for small electronics, laptop repairs, cameras, and miniature mechanical assemblies. Made from carbon steel with a nickel plating, they offer good corrosion resistance and high mechanical strength. The 82° flat head sinks flush into countersunk holes for a smooth, professional finish. Fully threaded with standard 56 threads per inch (fine thread). Perfect for replacing original screws in American‑made equipment or any project requiring #2-56 hardware. Available in various quantities – select your pack size.
✨ Why Choose These Nickel Plated #2-56 Countersunk Screws
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#2-56 UNC thread (American standard) – 56 threads per inch, fine thread. Approx. 2.18mm diameter. Commonly used in electronics, laptops, cameras, and small appliances.
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1/4 inch length (0.25") – Measured including the head (standard for countersunk screws). Ideal for thin panels, PCB mounting, and device enclosures.
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Nickel plated carbon steel – Provides good corrosion resistance, isolating the steel from air and moisture. Suitable for humid or industrial environments.
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High mechanical strength – Carbon steel offers high hardness and good tensile strength. Countersunk design provides flat installation and avoids bulging interference.
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Phillips cross drive – Compatible with #0 or #1 Phillips bits. Convenient for power tools or manual precision drivers.
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Fully threaded – Threads run the entire length for maximum grip and compatibility with standard #2-56 nuts or tapped holes.
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Wide applications – Electronics (mobile phone motherboards, laptop casings), mechanical equipment (control panels, small motor covers), automotive (small brackets, interior trim), and hobby projects.
📏 Technical Specifications – #2-56 Countersunk Phillips Screws
| Specification |
Details |
| Product Name |
#2-56 Countersunk Phillips Machine Screws |
| Thread Size |
#2-56 UNC (56 threads per inch – fine) |
| Thread Diameter (approx.) |
2.18mm (0.086") |
| Length |
1/4 inch (0.25" / 6.35mm) – includes head |
| Head Style |
Countersunk flat head (82° typical) |
| Drive Style |
Phillips cross‑head (use #0 or #1 Phillips bit) |
| Material |
Carbon steel |
| Finish |
Nickel plated (bright silver) |
| Thread Type |
Fully threaded |
| Length Measurement |
Length includes head (total screw length – standard for countersunk) |
❓ FAQs – #2-56 Countersunk Screws
🔸 What does #2-56 mean? Is it metric or imperial?
#2-56 is an American (imperial) thread size. The "#2" indicates the screw diameter (approximately 2.18mm or 0.086"), and "56" means 56 threads per inch (fine thread). It is not metric – use with #2-56 nuts or tapped holes. This size is common in laptops, cameras, and small electronics.
🔸 How is length measured for these countersunk screws?
For countersunk screws, length is measured as total screw length including the head – from the top of the flat head to the tip. This 1/4" screw is 0.25 inches (about 6.35mm) long overall. This matches common fastener standards.
🔸 Are these screws fully threaded? What hex key do I need?
Yes – they are fully threaded from under the head to the tip. Since these are Phillips drive, no hex key is needed. Use a #0 or #1 Phillips screwdriver.
🔸 Will nickel plating prevent rust?
Nickel plating provides good corrosion resistance for indoor use and light outdoor exposure. It isolates the carbon steel from air and moisture, making it suitable for humid environments. For continuous saltwater or heavy moisture, stainless steel is recommended.
🔸 Can I use these screws with nuts, or are they self‑tapping?
These are standard machine screws – they require a matching #2-56 nut or a pre‑tapped hole. They are not self‑tapping. For best results, pair with nickel‑plated steel or stainless #2-56 nuts.
🔸 What devices commonly use #2-56 x 1/4" countersunk screws?
These screws are often found in laptops (for bottom case or hinge covers), cameras (tripod mount screws or body assembly), small appliances, RC vehicles, and hobbyist electronics. Always check your original screw's thread and length before ordering.
