Bolt DIN 931 5/8x3 1/2 (89 mm) Grade 5 (~8,8) UNF 18

Overview

DIN 931 is a hex head bolt with a partial thread and inch thread. This bolt is made of high-quality strength class 8.8 steel, providing significant resistance to mechanical loads. The partial thread helps reduce the risk of cracks in the joint, as the smooth shank section under the head promotes even load distribution. Various sizes are available, making it versatile for many applications.

Applications

The DIN 931 8.8 UNF hex head bolt with partial thread is ideal for applications requiring high strength and reliable connections. Thanks to strength class 8.8, this bolt can withstand significant loads, making it an optimal choice for heavy machinery, the automotive industry, and construction.

The inch thread ensures compatibility with equipment designed according to American standards, making it useful in projects involving imported technologies. The partial thread allows efficient force transfer, while the hex head ensures convenient installation and removal. This bolt is a reliable component for any structure requiring a strong connection.

Alternatives

DIN 931 8.8 UNF is a hex head bolt with a partial thread and UNF Fine inch thread. It is made of carbon steel, providing high strength and reliable connections. Strength class 8.8 indicates the permissible load, making it suitable for structures where high resistance to mechanical loads is required.

When choosing this bolt, it is important to consider that it corresponds to the ASME B18.2.1 standard for hex bolts with inch threads. Pay attention to the thread type: UNF has a finer pitch than UNC, so they cannot be used interchangeably. The dimensions and characteristics of DIN 931 8.8 UNF make it a versatile solution for various engineering tasks.

Technical Specifications

Please note: the product color may vary depending on the production batch — black or grey. This does not affect the technical characteristics or quality of the product.

Is It Worth Buying

The DIN 931 8.8 UNF hex head bolt with partial thread is ideal for applications requiring high strength and reliable connections. Strength class 8.8 provides excellent load resistance, making it an optimal choice for structures exposed to significant mechanical impact.

The UNF inch thread allows this bolt to be used in systems where inch-threaded connections are already present, simplifying installation and reducing the risk of thread damage. The partial thread provides better fastening in the material, increasing the overall reliability of the connection.

Where It Is Used

The DIN 931 8.8 UNF hex head bolt with partial thread is a reliable solution for applications requiring high strength. Strength class 8.8 provides excellent load resistance, making it suitable for mechanisms and structures where connection reliability is important.

Thanks to its inch thread, this bolt can be easily integrated into systems that use American standards, helping to avoid compatibility issues. The partial thread provides better fastening in materials, reducing the risk of the connection loosening during operation.