In the world of electronics manufacturing, every component matters — not just the visible ones like screens, batteries, or PCBs, but also the fasteners that hold everything together. Among these, M2 and M2.5 screws play a critical role in ensuring mechanical reliability, compactness, and ease of maintenance.
Whether you’re assembling a laptop, securing an M.2 SSD, or mounting a display inside a TV, choosing the right screw size ensures not only structural integrity but also long-term serviceability.
Understanding the Basics: What Are M2 and M2.5 Screws?
M2 and M2.5 screws are part of the ISO metric screw family, with diameters of 2 mm and 2.5 mm, respectively. These small but strong fasteners are commonly used in compact electronic assemblies due to their fine thread pitch and precision.
In the intricate world of electronics manufacturing, the smallest components often have the biggest impact. Among these are M2 and M2.5 screws—compact, high-precision fasteners that play a vital role in the structural integrity and functionality of electronic devices. While these screws may seem minor in cost and size, their influence on product durability, serviceability, and performance is significant.
Whether you’re assembling a smartphone, laptop, camera, or a flat-screen TV, selecting the correct screw type is essential. In this article, we break down the characteristics, applications, and material choices of M2 and M2.5 screws commonly used in PCB (Printed Circuit Board) assembly and other electronics applications.
Where Are M2 Screws Used?
M2 screws (2 mm diameter) are widely used in precision applications, thanks to their compact size and lightweight design. Their typical thread pitch is 0.4 mm, making them ideal for delicate electronics where minimal torque is required.
Common Applications:
- Mounting M.2 SSDs in laptops and desktops
- Fixing circuit boards inside smartphones, tablets, and cameras
- Assembling wearables, drones, and handheld medical devices
- Attaching internal modules, daughterboards, and support brackets
Materials & Head Types:
M2 screws are available in corrosion-resistant materials like stainless steel, brass, titanium, and nylon for non-conductive applications. Head types include pan head, countersunk, socket head, and button head, depending on the device’s design and torque requirements.
M2.5 Screws: When More Strength is Needed
Slightly larger and stronger than M2, M2.5 screws (2.5 mm diameter) are preferred for structural applications where added durability is essential.
Common Applications:
- Securing LCD monitor mounts and TV enclosures
- Mounting laptop chassis components
- Fastening plastic or metal brackets inside electronic housings
- General-purpose use in consumer electronics and modular assemblies
Typical Features:
These screws are available in lengths ranging from 6 mm to 32 mm, with popular head styles including pan, round, flat, and button heads — driven by Phillips, slotted, Torx, or hex bits.
Comparison Table
| Screw Size | Diameter | Typical Lengths | Common Applications | Materials | Head Types |
|---|---|---|---|---|---|
| M2 | 2 mm | 2 mm – 50 mm | M.2 SSDs, circuit boards, cameras, watches | Stainless steel, Nylon, Brass | Pan, countersunk, hex socket, button |
| M2.5 | 2.5 mm | 6 mm – 32 mm | LCD mounts, TV housings, laptop frames | Steel, Stainless steel, Brass | Pan, flat, round, button |
Why These Screws Are Perfect for Electronics Assembly
M2 and M2.5 screws are favoured for fast, reliable, and space-efficient assembly. Their fine thread ensures a secure fit with low torque, minimising damage risks. In high-volume manufacturing, the consistency of these screws improves production speed and reduces failure rates.
Additionally, many electronics today feature tool-less M.2 latching mechanisms that either supplement or replace M2 screws for even faster disassembly and upgrade cycles — especially in laptops and desktops.
🛠️ Why These Screws Matter in PCB Assembly
The dense layouts of modern electronics require fasteners that can:
- Fit into tight spaces without interfering with circuitry
- Provide strong, secure attachment with minimal torque
- Be non-conductive or non-magnetic when necessary
- Withstand multiple assembly/disassembly cycles
Both M2 and M2.5 screws deliver on these needs, making them essential fasteners for any electronics OEM.
⚡ Fast Assembly, Safe Maintenance
Electronics manufacturers often prefer M2 screws because they:
- Are compatible with tool-less latching systems for M.2 drives
- Reduce the risk of over-tightening or cross-threading
- Speed up repair, upgrade, and testing cycles
Meanwhile, M2.5 screws offer a balance of strength and size for larger internal components that still require careful handling and space efficiency.
🧪 Material Matters: Choosing the Right Screw Composition
Depending on your product’s environment and performance requirements, the screw material should align with:
- Corrosion resistance (Stainless steel for outdoor or high-humidity usage)
- Electrical insulation (Nylon or polymer screws)
- Weight sensitivity (Titanium in portable devices)
- Non-magnetic properties (Brass in sensitive electronic circuits)
🧾 Final Thoughts
The use of M2 and M2.5 screws may seem like a small detail, but for factory managers and buyers, they represent a key part of ensuring quality, reliability, and efficiency in electronics manufacturing. Choosing the right fastener is essential in electronics manufacturing — and M2/M2.5 screws strike the ideal balance between precision, strength, and efficiency. Whether you’re an OEM, a hardware repair engineer, or an electronics hobbyist, understanding where and how to use these screws ensures a secure, functional, and future-ready product.
Choosing the correct screw type helps:
- Prevent costly damage during assembly
- Ensure compliance with ISO standards
- Improve serviceability and reduce warranty claims
📞 Need Help Selecting the Right Screws?
At Horizon Inc, we specialise in supplying high-quality fasteners tailored for electronics and PCB applications.
Contact us today to discuss your electronics fastening needs:
📞 Call: 080-41179152
💬 WhatsApp: +91 9916777262
📧 Email: sales@horizonincindia.com
🌐 Visit: www.horizonincindia.com