DIN 933 8,8 Delta Hexagonal head bolt with full thread, countersunk hole in the thread

Overview

DIN 933 8.8 Delta Hexagon Head Bolt with Full Thread is a high-quality fastener that combines a hexagon head and a thread that covers the entire shaft. This bolt is made of carbon steel, which gives it high strength in accordance with class 8.8, indicating its ability to withstand significant loads. An additional feature is a counterbore hole in the thread, which provides increased fixation and prevents loosening under vibration conditions. This bolt is ideal for use in a variety of structures where connection reliability and durability are important.

Technical specifications

Technical characteristics of DIN 933 8.8 Delta bolt with hexagonal head and full thread, with counterbore in the thread:

• Standard: DIN 933, equivalent to ISO 4017
• Material: carbon or alloy steel, stainless steel options available
• Strength class: 8.8, belonging to the category of high-strength bolts
• Diameters: sizes M6, M8, M10, M12, M14, and others available
• Lengths: standard options from approximately 10 mm to 150 mm, depending on the selected diameter
• Thread pitch: metric thread, with typical pitches of 1; 1.25; 1.5; 1.75 mm for diameters from M6 to M12 and larger, in accordance with the standard
• Coatings: zinc (plain or hot-dip galvanized), yellow zinc, uncoated, as well as brass or stainless steel options depending on operating conditions. Protective Delta-MKS is a protective dispersed zinc anti-corrosion coating that provides highly effective cathodic protection against corrosion.

Analogues

Analogues of DIN 933 8.8 Delta:

• ISO 4017 - this standard fully complies with DIN 933 and has a hexagonal head with a full metric thread.
• GOST 7798-70 - a standard analogous to DIN 933 / ISO 4017.
• GOST 7805-70 - another GOST standard that has similar technical characteristics in terms of wrench size, diameter, and thread pitch, with minor differences.
• DIN 558 - also mentioned as an analogue of DIN 933/ISO 4017; differs in accuracy class, for example, C, and some shape parameters, but in general is considered interchangeable in many cases.
• DIN 931 - a standard describing bolts with incomplete threads, but in terms of shape and size, it can be used together with DIN 933 8.8 Delta.

Areas of application 

The DIN 933 8.8 Delta bolt with a hexagonal head and full thread, as well as a counterbore hole in the thread, is an important element for various industries. This type of bolt is often used in mechanical engineering to connect structures such as housings, brackets, and other metal parts. In the construction sector, it is used to securely connect metal frames, formwork, and truss elements. In the automotive industry, the bolt is used to secure subframes, engine brackets, and suspension components. In addition, it is widely used in the energy and electrical engineering industries for the installation of various shields, support structures, and insulator fasteners. Thanks to its full thread, this bolt allows for adjustment and change of the connection length, making it a versatile solution for many technical tasks. The counterbore hole in the thread adds extra stability and prevents self-loosening, which increases the reliability of the connections.

Questions and Answers

Is it profitable to buy?

Purchasing a DIN 933 8.8 Delta bolt with a hexagonal head and full thread, supplemented with a counterbore in the thread, is an excellent choice for those who value reliability and high quality. In our Dinmark range, you will find various strength classes, including 8.8, as well as a wide range of diameters from M2 to M72. We offer various coating options, such as zinc or stainless steel, allowing you to find the best option for your specific application.

Where it is used

DIN 933 8.8 Delta bolt with hexagonal head and full thread with a counterbore hole in the thread is used in: construction - for connecting metal structures, creating frames, and installing mounting elements; mechanical engineering - for fixing housings, manufacturing brackets and joints; in industrial and manufacturing processes - for securing equipment, supporting supports and use with washers and nuts.