Heavy-Duty Stainless Steel Hexagon Socket Screw for Precision Fastening

• Customization: Available
• Material: Stainless Steel
• Type: Round Head
• Model NO.: 1-1
• Connection: Common Bolt
• Head Style: Round
• Standard: DIN
• Grade: 4.8
• Application: Building
• Use: Fastening Connection
• Thread Type: Full Thread
• Applicable Industries: Construction, Manufacturing
• After-Sales: Three Months
• Transport Package: Container
• Specification: 1-100
• Trademark: Huilin
• Origin: Handan, Hebei
• HS Code: 0101101010
• Production Capacity: 50000

Product Description

The Cup Head Hexagon Screw, also known as a cylindrical head hexagon screw, is a staple in the world of mechanical fasteners. Here's a comprehensive look at its attributes and benefits:

1, Appearance and Structure

• Head Shape: The hexagonal screw sports a cylindrical head, ingeniously designed with a hexagonal hole to pair perfectly with a hex wrench, simplifying installation and ensuring a seamless fit.

Side Design: Its head boasts a subtle curvature on the sides, not only enhancing its sleek appearance but also providing a superior grip and ease during installation.

Internal Hexagonal Hole: The depth of the hexagonal hole is meticulously aligned with the head's height, ensuring a stable and secure grip with the wrench, minimizing the risk of slippage.

2, Dimensions and Specifications

Head Size: Typically, the diameter of the head exceeds the thread by 2-3 millimeters, which acts as a safeguard against tool slippage, while the head height is proportionately balanced between 0.6 to 1 times the thread diameter.

Thread Specifications: The threaded section adheres to either standard metric or imperial measurements. For instance, an M6 × 1.0 metric thread is 6 millimeters in diameter with a 1-millimeter pitch, whereas 1/4 "-20 in British terms means a quarter-inch diameter with 20 threads per inch.

Common Specifications: Metric options span from M3 to M20, with lengths from 5mm to 200mm. Imperial measurements also offer diverse selections to meet various needs.

3, Material and Strength

Material Selection: These hexagonal screws are crafted from a variety of durable materials such as carbon steel, stainless steel (including 304, 316), and alloy steel (like SCM435), each tailored for specific applications.

Carbon Steel: While cost-effective, it offers limited rust resistance, making it ideal for standard environments.

Stainless Steel: Known for its exceptional corrosion resistance, it thrives in humid or chemically harsh conditions, albeit with slightly reduced strength.

Alloy Steel: Post heat-treatment, it excels in high-strength applications, particularly in the automotive and heavy industry sectors.

• Strength Grade: These screws are classified as strength grades 8.8 (tensile strength 800MPa, yield strength 640MPa) or 12.9 (tensile strength 1200MPa), with higher grades indicating superior load-bearing capabilities.

4, Surface Treatment

Common processing methods encompass galvanizing (both electroplating and hot-dip), blackening, Dacromet coating, and nickel plating, each with distinct protective features.

Galvanized: Electroplating provides a silver-white finish with a thickness of 5-8 microns, while hot-dip offers a gray-white layer of 20-30 microns, enhancing rust resistance despite a rough surface.

Blackening Treatment: Utilizes high-temperature oxidation to create a black oxide film, offering basic rust prevention at a low cost.

Dacromet Coating: With a gray hue, it's engineered to withstand over 500 hours of salt spray, making it ideal for marine environments.

Nickel Plating: Delivers a bright silver aesthetic, balancing rust prevention with wear resistance, perfect for precision applications.

5, Application

Application Scenarios: The hexagonal screws within cup heads shine in applications demanding high clamping force or confined spaces, such as in mechanical manufacturing, electronic appliances, automotive, maritime, and aerospace industries.