Bolt DIN 933 M8x25 12,9 zinc-nickel black

Overview
The DIN 933 12.9 hex head bolt with full thread is a high-performance fastener characterized by a hex head and a thread that extends from the base of the head to the end. It is typically made of high-strength carbon steel, which provides it with enhanced resistance to loads and deformation. The strength class of 12.9 indicates its ability to withstand significant mechanical loads, making it an ideal choice for critical structures and demanding applications where high reliability and durability are required.

Coating: Zinc-nickel plating is an innovative anti-corrosion solution for fasteners that combines high protective performance, mechanical strength, and environmental safety.

The key advantages of zinc-nickel plating 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 discreet appearance - the coating has a deep black color, making it virtually invisible.

Technical Specifications
Technical specifications for the DIN 933 12.9 hex head bolt with full thread:

Equivalents

Equivalents of the DIN 933 12.9 standard:

ISO 4017 - a fully equivalent standard featuring a hex head and a full metric thread.

GOST 7798-70 - a standard equivalent to DIN 933 12.9 / ISO 4017.

GOST 7805-70 - another GOST variant whose technical specifications are similar to those of DIN 933 12.9, with minor differences in wrench sizes and thread diameters.

DIN 558 is also considered equivalent to DIN 933 12.9/ISO 4017; it has some variations in precision classes and form parameters, but in many cases can be used interchangeably.

Applications

The DIN 933 12.9 bolt is a critical component in mechanical engineering and industry, used to join various components such as housings, brackets, and metal parts. In the construction industry, it is used to join metal structures, frames, formwork, and truss elements. In the automotive industry, the bolt is used to securely fasten subframes, engine mounts, and suspension components. In addition, they are widely used in the power generation and electrical engineering sectors, where they are employed for mounting electrical panels, supports, and securing insulators. Thanks to their full thread, these bolts allow for adjustable or variable fastening, making it easy to adapt to changes in length or clearance.

Questions and Answers

Is it worth buying?

Purchasing a DIN 933 bolt with a strength class of 12.9, a hex head, and full thread is an excellent choice for those who require high reliability and durability. Our product range includes a variety of sizes from M2 to M72, allowing you to find the perfect option for your specific requirements. Additionally, we offer various coatings, such as zinc or stainless steel, which provide extra protection against corrosion and enhance performance. When choosing DIN 933 12.9 bolts, you can be confident in their quality and compliance with international standards.

Applications

DIN 933 12.9 hex head fully threaded bolts are used in: the construction industry - for the manufacture of metal structures, frames, and mounting components; mechanical engineering - for the manufacture of housings, brackets, and connections; and industrial facilities - for securing equipment, supports, and in fastening systems together with washers and nuts.