M3x7cm Screw

M3x7mm Screw: An Overview

The M3x7mm screw is a type of metric screw characterized by its nominal diameter of 3mm and a length of 7mm. This size is commonly used in various applications, particularly in electronics, machinery, and assembly tasks where reliable fastening is required.

Specifications

• Diameter: The “M3” designation indicates a nominal outer diameter of 3mm, which is a standard size in the metric screw classification.
• Length: The “7mm” refers to the length of the screw, making it suitable for applications where a medium-length screw is needed.
• Thread Pitch: The standard thread pitch for M3 screws is typically 0.5mm, meaning there are 2 threads per millimeter.

Types of M3x7mm Screws

M3x7mm screws come in various head styles and materials, including:

• Pan Head: These screws have a rounded head and are often used in applications where a low profile is not critical.
• Button Head: Featuring a dome-shaped head, these screws are aesthetically pleasing and provide a smooth finish.
• Flat Head: Designed to sit flush with the surface, flat head screws are ideal for applications requiring a smooth finish.
• Socket Head Cap Screws: These screws have a hexagonal socket in the head, allowing for easy tightening with an Allen wrench.

Material Options

M3x7mm screws are available in various materials, including:

• Stainless Steel: Known for its corrosion resistance, stainless steel is a popular choice for outdoor and marine applications.
• Zinc-Plated Steel: This option provides a layer of protection against rust and is commonly used in general-purpose applications.
• Plastic: For lightweight applications or where electrical insulation is needed, plastic screws can be used.

Applications

The M3x7mm screw is widely used in numerous applications, such as:

• Electronics: Commonly found in securing components within devices like computers, printers, and other electronic equipment.
• Model Building: Used in assembling model kits, drones, and RC vehicles due to their compact size.
• Furniture Assembly: Often utilized in flat-pack furniture where small screws are needed for assembly.
• Automotive: Employed in various automotive components where space is limited.

Purchasing Options

M3x7mm screws can be easily sourced from various retailers, including:

• Home Improvement Stores: Many local hardware stores and chains like Home Depot offer M3 screws in various styles and quantities.
• Online Retailers: Websites like Amazon provide a wide selection of M3x7mm screws, often available in bulk packs for convenience 1.
• Specialty Suppliers: For specific applications, such as electronics or machinery, specialty suppliers may offer tailored options.

Conclusion

The M3x7mm screw is a versatile and essential component in many fields, from electronics to furniture assembly. Its medium length, combined with various head styles and materials, makes it suitable for a wide range of applications. Whether you’re a hobbyist, a professional engineer, or a DIY enthusiast, understanding the specifications and uses of M3x7mm screws can help you select the right fasteners for your projects.