A2 and A4 stainless steel fine thread hex nuts are used in metric bolted joints where a smaller thread pitch than standard coarse thread is required. Fine threads provide more thread turns per unit length and allow finer adjustment during assembly, making them suitable for machinery, mechanical assemblies and other engineering applications with specific thread pitch requirements. The range includes metric fine thread hex nuts in A2 and A4 stainless steel for applications combining fine threads with requirements for corrosion resistance. A2 and A4 provide material options for different applications and environmental requirements.