M3-M6 Screws: A Complete Guide and Their Applications

Introduction

Screws are integral components in the assembly of various products, from electronics to furniture. M3 to M6 screws, in particular, are among the most common size-types used across industries. In this blog, it’s going to talk about M3-M6 screws in terms of its characteristics and usage.

What Are M3 Screw to M6 Screw?

The “M” in M3-M6 refers to metric sizing. The numbers that come after the letter M indicate the screw diameter in mm. So for example M3, M4, M5 and M6 screws are 3mm, 4mm, 5mm and 6mm in diameter respectively. Available in multiple lengths, these screws are suited to different strength requirements and building materials standards.

M3 Screw: 3mm diameter. Best for precision tasks in electronics and lightweight assemblies.

M4 Screw: 4mm diameter which is common in medium-duty uses such as furniture and light fixtures.

M5 Screw: 5mm diameter and is well-suited for automotive parts and machinery, offering a good balance of strength.

M6 Screw: 6mm diameter which is made for heavy-duty applications like structural connections and industrial equipment.

Applications of M3 to M6 Screws

M3 Screws:

● Electronics: Small devices, such as cameras, computers, and drones, where precision and tight fastening are needed.

● Model Making: It is ideal for hobby projects that call for small, detailed components.

M4 Screws:

● Furniture Assembly: It does well in tasks involving medium-duty assembling of furniture and fixtures.

● Light Machinery: Usually used in appliances and equipment that require only moderate strength.

M5 Screws:

● Automotive Parts: These are frequently used in car components due to their compact size and strength.

● Heavy Equipment: Better suited for heavy fastening applications that may not require extra-large diameter screws.

M6 Screws:

● Furniture Assembly: Widely used in ready-to-assemble furniture, providing strength and durability in heavy-duty applications.

● Automotive & Machinery: This is used in the repair of automobiles and machinery where higher torque and strength levels are needed.

How to Choose M3 Screw to M6 Screw?

1. Size and Diameter: The M3 is preferred for smaller, precision jobs, M4, and M5 are good for medium to heavier use, and M6 for large, heavy-duty fastenings.

2. Thread Pitch: Finer threads in M3 for precision work, medium thread pitches in M4 and M5 offer a blend of strength and versatility; for heavy loads, the coarser-threaded M6 screws are used.

3. Material and Strength: M3 screws are good for light-duty indoor applications, while M4 and M5 provide moderate strength. M6 screws can be used for high-stress applications that require tasks like automotive and machinery.

4. Environment: M3 screws are ideal to be used indoors, and also M4 and M5 can be quite versatile for general-purpose use. And for corrosive or outdoor environments, one will find M6 stainless steel screws to be supreme.

Common Screw Installation Tips

1. The pre-drilled holes: It should always be smaller than the screw so that it forces its way in for a tight fit.

2. The right equipment: Screwdriver or electric drill with a bit each corresponding to all types of screws.

3. Avoid over-tightening: This results in thread striation or material damage.

Conclusion

Screws can effectively function on items ranging from lightweight electronics to heavy machinery, in sizes ranging from M3 to M6. It is their characteristics, thread pitch, material composition, among others determine performance and suitability for certain tasks. The proper selection and installation, such as pre-drilling the holes or refraining from over-tightening, provide secure and reliable fastening in diverse environments and industries.

Looking for High-Quality Screws?

JLCMC offers a wide range of high-quality screw products, M3-M6, wholly produced in our factory and sold at competitive prices. It can be utilized in electronic or heavy-duty furniture applications.

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