Professional U-Bolt & Industrial Ubolt Solutions Round U-Bolts Standard round U-bolts perfect for pipe mounting and general applications. Square U-Bolts Square U-bolts ideal for frame and structural applications. Heavy-Duty U-Bolts Grade 8 equivalent U-bolts designed for maximum strength and durability. Custom U-Bolts Specialized U-bolts manufactured to your unique specifications. Ubolt Customization Options Customize your ubolts to match your exact project specifications. Material Selection Choose from various grades of steel and stainless steel options. Surface Finishes Multiple finish options including zinc plating and hot-dip galvanization. Custom Sizing Precise sizing options from 3/8″ to 1″ diameter with custom lengths available.