Overview
This Grade 8 carbon steel hex nut is engineered for demanding, high-strength fastening applications where reliability is critical. Manufactured to the stringent GB6171 standard, it provides a precision fine-threaded connection for heavy machinery, structural assemblies, and industrial equipment. The black oxide finish enhances corrosion resistance and offers a uniform, non-reflective appearance suitable for both functional and finished applications. Supplied in a convenient package quantity of 12, this nut ensures you have the necessary components for efficient project completion and inventory management.
Key Features
Constructed from high-strength Grade 8 carbon steel for superior load-bearing capacity Fine thread pitch (M42 x 3) for improved adjustment precision and vibration resistance Black oxide finish provides a layer of corrosion protection and a professional look Manufactured to GB6171 dimensional standards for consistency and compatibility Package quantity of 12 supports batch assembly and reduces downtime
Specifications
System of Measurement: Metric Material Grade/Class: Grade 8
Material
Carbon Steel Thread Size: M42 x 3 Finish: Black Oxide Width Across Flats: 1.65 inches Package Quantity: 12
Applications
Heavy-duty structural steel connections Assembly of large industrial machinery and presses Maintenance and repair in manufacturing and fabrication facilities Infrastructure projects requiring high-strength, fine-threaded fasteners General use in construction, transportation, and energy sectors where a robust nut is required








