How Do You Select the Right Micro Screw for Your Project?

 

Micro screws are specialized fasteners designed for precision applications where size, weight, and accuracy are critical.

 

This article explores 10 key considerations for choosing micro screws and how we solve common challenges, ensuring your assemblies meet the highest standards.

What Are Micro Screws?

Micro screws, also called tiny screws or miniature screws, are fasteners with thread diameters ranging from M0.6 to M1.6 (sometimes up to M3).

 

Unlike standard screws, they are engineered for intricate assemblies requiring minimal space and weight.

 

For example, an M2 screw has a 2mm outer diameter with a 0.4mm pitch, ideal for securing compact components like circuit boards or watch movements.

Why Choose Micro Screws?

Unlike adhesives or snap-fits, micro screws offer:

♦ Removability: Facilitates repairs and upgrades (e.g., replacing a smartphone battery).

♦ Strength: Provides reliable fastening in high-vibration environments like automotive electronics.

♦ Precision: Ensures accurate component alignment in compact devices.

 

 

 

Here are 10 keys to guide your micro screw selection

 

1. Understand Your Application Needs

Micro screws serve diverse industries:

♦ Electronics: Secure PCBs, screens, and casings in smartphones and laptops.

♦ Medical Devices: Fasten surgical tools, hearing aids, and dental implants with biocompatible materials like titanium.

♦ Aerospace: Support lightweight assemblies in drones and satellites.

♦ Watchmaking: Hold intricate components in mechanical watches.Identify your industry’s requirements to select the right size, material, and design.

 

2. Choose the Right Size

Micro screw sizes range from M0.6 to M3. Always match the screw size to your component’s thread hole to avoid stripping.

Size	Diameter (mm)	Common Applications
M0.6	0.6	Precision instruments, micro robots
M1	1.0	Electronics, small appliances
M1.4	1.4	PCBs, eyeglasses
M2	2.0	Electronics, watches, models

 

3. Select the Appropriate Material

Material choice impacts durability and performance:

♦ Stainless Steel (304/316): Corrosion-resistant, ideal for electronics and medical devices.

♦ Titanium: Lightweight and biocompatible, perfect for aerospace and medical applications.

♦ Aluminum: Cost-effective and lightweight for consumer electronics.At Shi Shi Tong, we customize materials to meet your project’s needs, ensuring compatibility and longevity.

 

4. Pick the Right Head Type

Head types affect installation and aesthetics:

♦ Pan Head: Rounded, suitable for visible surfaces like watch cases.

♦ Pancake Screw: Flush with surfaces, ideal for optical devices.

♦ Flat Head: Sits flush for a sleek finish in electronics. Choose based on space constraints and aesthetic requirements.

5. Consider Drive Type

Drive types determine the tools needed:

♦ Phillips (PH00/PH000): Common for electronics, reduces slippage.

♦ Slotted: Used in glasses and watches, requires precision screwdrivers.

♦ Torx (T1-T5): Offers high torque for aerospace applications.

 

6. Evaluate Thread Type

Thread types include:

♦ Fine Threads: Ideal for plastics to prevent slipping.

♦ Self-Tapping: Eliminates pre-drilling in soft materials like eyeglass frames. Select threads based on material and installation method.

 

7. Prioritize Precision Manufacturing

Micro screws require high-precision machining to ensure thread accuracy. At Shi Shi Tong, we use advanced CNC lathes for tolerances as low as 0.03mm, meeting ISO 9001 standards.

 

8. Address Corrosion Resistance

For applications exposed to moisture (e.g., medical or outdoor electronics), choose screws with:

♦ Nickel Plating: Enhances corrosion resistance.

♦ Passivation: Improves stainless steel durability. We tailor surface treatments to your environment.

 

9. Plan for Customization

Standard screws may not fit unique designs. Shi Shi Tong offers custom micro screws with:

♦ Specific lengths (e.g., 2.5mm to 8mm).

♦ Non-standard head sizes or drive types.

♦ Custom coatings for aesthetics or functionality.

 

10. Ensure Reliable Supply

Sourcing micro screws can be challenging due to their specialized nature. Partner with a trusted supplier like Shi Shi Tong, offering:

♦ Fast delivery (7-10 working days).

♦ Sample testing to verify quality.

 

 

Case Study: Custom M1.2 Titanium Screws for an America Electronics Manufacturer

In 2024, an America electronics manufacturer approached Shi Shi Tong to develop M1.2 titanium micro screws for a compact medical sensor.

The client needed screws with a Torx T3 drive and a 0.25mm pitch to fit a space-constrained PCB while ensuring biocompatibility.

 

Our team:

♦ Conducted a design consultation to finalize specifications.

♦ Used Swiss-type CNC lathes for precision machining.

♦ Delivered 5,000 units within 8 days.

The client reported a 30% reduction in assembly time due to the screws’ precise fit, enhancing their product’s reliability.

 

 

FAQ

♦ What are micro screws used for?

Micro screws are used in electronics (e.g., smartphones, PCBs), medical devices (e.g., hearing aids), aerospace (e.g., drones), and watchmaking for securing small components.

♦ What are tiny screws called?

Tiny screws are called micro screws, miniature screws, or precision screws, typically with a thread diameter of M1.6 or below.

♦ What size is an M2 screw?

An M2 screw has a 2mm outer diameter and a standard 0.4mm pitch, commonly used in electronics and glasses.

♦ What is a micrometer screw?

A micrometer screw is a precision screw used in micrometers for accurate measurements, often confused with micro screws due to similar sizing.

 

 

Conclusion

Choosing the right micro screws ensures the success of your precision assemblies. By considering size, material, head type, and customization, you can optimize performance and reliability.

 

For tailored solutions, contact Shi Shi Tong to discuss your custom micro screw needs.

Skype: kalyn qin   M: +86 18818786322   Tel: +86 0755-27322278   sst@szsst88.com   Add: Building 9, Tantou First Industrial Zone, Songgang Street, Baoan, Shenzhen 518105, Guangdong Province, China