DIN 479 Short Hook Head Square Head Bolts

The DIN 479 standard, published by the German Institute for Standardization (DIN), describes the requirements for short-hooked square-head bolts. These square-head bolts are very easy to tighten using a wrench. They are in high demand, particularly in the mechanical, marine equipment, construction, and electrical industries. Square-head bolts conforming to this standard are produced in various sizes, from M3 to M100. Furthermore, they are manufactured in a wide range of specifications, including stainless steel square-head bolts, carbon steel square-head bolts, nickel alloy square-head bolts, and alloy steel square-head bolts.

The requirements for short hook-end square head bolts are included in the DIN 479 standard under the following headings:

• Mechanical properties of stainless steel for square head bolts
• Chemical composition of stainless steel for square head bolts
• Mechanical properties of steel for square head bolts
• Chemical composition of steel for square head bolts

Square head bolts are commonly known as lag bolts. These types of bolts are similar to very large screws and are mostly used in heavy timber assembly. The main benefit of using square head bolts is that they can be tightened with an adjustable wrench. It is possible to reach places where other tools cannot reach with a wrench and tighten this bolt. Most square head bolts are lag bolts, but there are other square head designs as well.

Square head bolts are bolts generally used in machinery. The fastening elements are placed on the channel iron with these bolts. Furniture manufacturers also use square head bolts to a large extent. They are used especially in blind areas.s

Stainless steels are divided into three groups as austenitic, ferritic and martensitic. Austenitic steel is by far the most common type (more than 90 percent of commercial fasteners). Steel groups and strength classes are indicated with four-digit letters and numbers as shown in the table in the standard.

Among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors, our organization also provides testing services for short hook-end square head bolts within the scope of DIN 479 standard, with its trained and expert staff and advanced technological equipment.