Grade 8.8 grade 10.9 galvanized black double-headed bolts

Grade 8.8 and Grade 10.9 are classifications of high-strength steel bolts, commonly used in various structural and mechanical applications. Here’s a breakdown of each grade and the characteristics of galvanized black double-headed bolts:

Grade 8.8
Material: Medium carbon steel, quenched and tempered.
Strength: Tensile strength of 800 MPa (megapascals) and yield strength of 640 MPa.
Applications: Used in general engineering, automotive, and construction applications where moderate strength is required.
Coating: Galvanized for increased corrosion resistance, often with a black finish for aesthetic purposes or additional protection.
Grade 10.9
Material: High carbon steel, quenched and tempered.
Strength: Higher tensile strength of 1000 MPa and yield strength of 900 MPa.
Applications: Suitable for high-stress applications, such as heavy machinery, structural connections, and high-load environments.
Coating: Also galvanized with a black finish to enhance durability against corrosion and wear.
Double-Headed Bolts
Design: Feature threads on both ends, allowing for easy installation and removal. Often used in applications where frequent disassembly is needed.
Applications: Common in scaffolding, lighting fixtures, and various mechanical assemblies.
Advantages of Galvanized Black Double-Headed Bolts
Corrosion Resistance: The galvanized coating provides protection against rust and corrosion, extending the life of the fastener.
Strength & Durability: High-strength grades ensure reliability under load.
Versatility: Suitable for a wide range of applications across industries.
Considerations
Torque Specifications: Follow the recommended torque values for each grade to ensure safe and secure connections.
Compatibility: Ensure that the bolts are compatible with the materials and components in your application.
If you need further details or specific applications for these bolts, let me know!