GB56 and GB55 are two types of hexagonal thickened nuts specified in the Chinese National Standard (GB). GB56 refers to Type I hexagonal thickened nuts, while GB55 refers to Type II hexagonal thickened nuts. These nuts are characterized by their height being thicker than ordinary hexagonal nuts, and are suitable for occasions where they need to be mounted and dismounted frequently or need to withstand larger loads.These are also compliant with DIN6330.

Material: including carbon steel, alloy steel, stainless steel (such as 304, 316, 316L, etc.) and other materials, the specific selection depends on the working environment and application requirements.

Grade: The product grade is different mechanical properties grade (such as 4.8 grade, 8.8 grade, 10.9 grade,A2-70, etc.), these grades reflect the tensile strength, yield strength and other mechanical properties of the bolt. Different grades are suitable for different load bearing requirements and working environments.

Advantage:

Increased Thickness: Provides more thread contact area than standard hex nuts, helping to spread the load and reduce stress on the nut itself. Reinforced design: For applications subject to high loads, such as heavy machinery and equipment. Durability: Due to their enhanced dimensions, these nuts are generally more durable and resistant to wear and fatigue than standard nuts.

Scope of Application

Mechanical and structural assemblies: These thickened nuts are suitable for mechanical and structural assemblies due to their extra thickness and strength, especially in environments subject to heavy loads or frequent disassembly. Maintenance-intensive equipment: Because they provide additional support and durability, they are suitable for equipment that requires frequent maintenance and disassembly. Industrial and construction applications: In the industrial and construction sectors, these nuts are used to fix and connect various structural elements.