Bolt DIN 7991 M4x8 10,9 zinc-nickel black

Overview

DIN 7991 countersunk head bolt with internal hexagon is the optimal choice for connections where it is important that the head remains flush with the surface. Due to its flat shape, it provides reliable fixation and an aesthetic appearance of the structure. This type of bolt is actively used in industry, furniture production, as well as in various metal structures. Made of high-quality steel with a zinc-nickel coating, it has increased corrosion resistance. The internal hexagon drive allows you to perform installation in confined spaces without difficulty.

Coating: Zinc-nickel black. Zinc-nickel coating is an innovative anti-corrosion solution for fasteners, combining high protective capacity, mechanical strength and environmental safety.

The key advantages of 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 vapors and does not cause corrosion in combination with aluminum parts;
• Increased thermal resistance - retains protective properties during temperature changes and during prolonged operation in high-temperature conditions;
• Mechanical strength - harder than pure zinc, has better resistance to scratches and wear;
• Environmental friendliness - less formation of oxidation products, respectively lower zinc emissions into the environment throughout the product's life cycle.
• Aesthetics and invisibility - the coating has a deep black color, which makes it inconspicuous.

Areas of application

DIN 7991 countersunk head hexagon socket bolts with 10.9 marking and black zinc-nickel coating are the ideal choice for applications requiring high strength and corrosion resistance. These bolts are widely used in various industries such as automotive, mechanical engineering, and in structures where aesthetic appearance is important. The countersunk head provides a smooth surface after installation, which reduces the risk of mechanical damage and increases safety. They are the optimal solution for projects with limited space, where not only functionality but also aesthetics are important.

Technical specifications

Technical characteristics of the DIN 7991 10.9 zinc-nickel black bolt with countersunk head and internal hexagon

Questions and answers

Is it profitable to buy

Buying DIN 7991 countersunk head bolts with internal hexagon is an excellent choice for those who value aesthetics and functionality. These bolts provide a neat fit, which avoids protrusions and is suitable for use in confined spaces. In our assortment you will find bolts with a strength class of 10.9, which have a black zinc-nickel coating, which provides additional protection against corrosion. Reliability, durability and aesthetic appearance - all in one product.

Where it is used

The DIN 7991 10.9 bolt with a zinc-nickel black coating and a countersunk head with an internal hexagon is ideal for applications where aesthetics and safety are important. Its design allows the bolt head to be recessed below the surface of the part, which prevents possible mechanical damage and prevents accidental engagement. This bolt is often used in industries including automotive, electrical engineering and construction, where high connection strength is required.

The strength of grade 10.9 ensures reliability in connections that are subject to significant loads, and the zinc-nickel coating provides good corrosion resistance, making it ideal for use in aggressive environments. It will be an excellent choice for those looking for a reliable and aesthetic solution for fastening in confined spaces.