Common Screw Types and Standards

Screws are essential fasteners widely used in machinery, furniture, construction, and electronics. Choosing the right screw type according to standards ensures assembly efficiency, structural stability, and product safety.

As a professional screw manufacturer, Xinchi Fasteners is glad to introduce common screw types and their standards, helping you select the most suitable screw products.

Hex Head Screws and Standards

Hex head screws are mechanical fasteners with a six-sided head, designed for installation using a wrench or socket. They are commonly used in machinery, industrial equipment, and construction, especially in applications requiring high torque. Hex head screws often follow international standards such as ISO 4014/4017, DIN 933/931, or ANSI B18.2.1, ensuring compatibility and reliable performance.

Flat Head and Countersunk Screws

Flat head and countersunk screws are widely used in woodworking, furniture assembly, and electronics. Flat head screws sit flush or slightly below the material surface, while countersunk screws can be fully embedded for a clean finish. Standards for these screws include ISO 10642 for cross-recessed countersunk screws and DIN 965 for cross-recessed flat head screws, ensuring consistency in dimensions and performance.

Self-Tapping and Self-Drilling Screws

Self-tapping and self-drilling screws are functional screws designed for quick installation. Self-tapping screws create their own thread in metal or plastic without pre-drilling, while self-drilling screws have a drill tip that allows drilling and fastening in metal sheets. Common standards include ISO 1478 for tapping screws and DIN 7504 for self-drilling screws. Using screws that meet these standards ensures strength, durability, and proper thread engagement.

Screws by Material

Screws are made from various materials, each suited for specific applications:

• Carbon Steel Screws: High strength and cost-effective, suitable for general machinery and construction.
• Stainless Steel Screws: Corrosion-resistant, ideal for outdoor or humid environments (standards: ISO 3506).
• Copper Screws: Good conductivity, often used in electronics and decorative applications.
• Aluminium Screws: Lightweight and corrosion-resistant, suitable for aerospace and transportation applications.

Selecting screws according to material standards ensures performance under different environmental conditions.

Surface Treatment Standards

Surface treatments enhance both corrosion resistance and aesthetics. Common treatments include:

• Zinc Plating: Improves rust resistance for outdoor use (standards: ISO 2081).
• Black Oxide: Reduces corrosion and glare, suitable for mechanical parts (standards: ISO 9987).
• Nickel/Chrome Plating: Provides a bright, decorative finish, ideal for high-appearance products (standards: ASTM B456/B633).

Proper surface treatment according to standards extends screw lifespan and improves product appearance.

Xinchi Fasteners Factory Advantages

Xinchi Fasteners Co., Ltd. is a professional fastener manufacturer with 102 cold-heading machines and a daily output exceeding 10 million pieces, ensuring stable and efficient production. The new factory covers 30,000 square meters with two six-story buildings, equipped with advanced production equipment and strict quality control systems. Xinchi Fasteners offers a wide range of screw types, materials, sizes, and surface treatments that meet international standards (ISO, DIN, ANSI), suitable for machinery, furniture, electronics, and construction industries.

Xinchi is a trustworthy fastener company. We are the designated fastener supplier to“STAPLE”. As a trusted fastener supplier, Xinchi Fasteners offers a wide range of high-quality fasteners, including nuts, screws, bolts, rivets, and washers. Our products are widely used in automotive, machinery, construction, electronics, and furniture industries, trusted by global customers for stability, precision, and durability. Choosing Xinchi fasteners guarantees high-quality products, reliable supply, and professional technical support.