DIN 912 12,9 black zinc-nickel Cylindrical-head bolt with internal hex

Overview

The DIN 912 8.8 zinc-nickel black bolt is a high-quality fastener with a cylindrical head and an internal hexagon, ensuring a reliable connection even under the most challenging conditions. This bolt is ideal for applications where high joint strength and limited access for tools are critical. The 8.8 strength class guarantees resistance to significant loads, while the zinc-nickel plating provides additional corrosion protection, enhancing the product’s durability. This bolt is an excellent choice for the industrial, automotive, and energy sectors, where both functionality and aesthetics are important.

Coating: The zinc-nickel coating is an innovative anti-corrosion solution for fasteners, combining high protective performance, mechanical strength, and environmental safety.

The key advantages of the zinc-nickel coating are:

• Excellent corrosion resistance - more than three times higher than that of conventional zinc;
• Low risk of hydrogen embrittlement;
• Compatibility with aluminum - does not form galvanic couples and does not cause corrosion when combined with aluminum parts;
• Enhanced heat resistance - retains its protective properties under temperature fluctuations and during prolonged operation in high-temperature conditions;
• Mechanical strength - harder than pure zinc, with better resistance to scratches and wear;
• Environmental friendliness - less formation of oxidation products, resulting in lower zinc emissions into the environment throughout the product’s entire life cycle.
• Aesthetics and Discretion - The coating has a deep black color, which makes it virtually invisible.

Applications 
The DIN 912 bolt with a cylindrical head and internal hex is widely used in various industries, such as mechanical engineering, the automotive industry, the energy sector, and construction. This type of bolt is ideal for joining components in tight spaces where the use of traditional wrenches is difficult or impossible. Thanks to its internal hex design, it ensures high tightening reliability and can withstand significant loads due to its strength class of up to 12.9. DIN 912 bolts are indispensable components for ensuring the reliability and durability of fasteners in a wide variety of structures.

Technical Specifications
Technical specifications for the DIN 912 zinc-plated bolt with a cylindrical head and internal hexagon

Questions and Answers

Is it worth buying?

Purchasing a DIN 912 (12.9) bolt with a cylindrical head and internal hex is an excellent choice for those who value reliability and high performance. This bolt offers exceptional strength thanks to its 12.9 strength class, allowing it to withstand significant loads of up to 1,300 N/mm².

The cylindrical head shape and internal hex socket ensure easy installation in confined spaces and allow for optimal tightening torque. The bolts are made of high-quality steel with a zinc coating, which enhances their resistance to corrosion and wear. Thanks to these characteristics, DIN 912 12.9 bolts are ideal for applications in mechanical engineering and other industrial sectors.

Applications

The DIN 912 bolt with a cylindrical head and internal hexagon is an indispensable component in many industries, such as mechanical engineering, automotive manufacturing, metalworking, power generation, and construction. This type of bolt is ideal for assembling a wide variety of equipment, including engines, gearboxes, machine tools, as well as metal structures and industrial installations. Thanks to its internal hex design, it provides convenient access in confined spaces and ensures a reliable and precise connection.