The LD-390 carbon steel threaded rod, also known as all-thread rod or studding, is a versatile fastening component featuring full-length metric coarse thread along its entire length. Unlike standard bolts that have a defined head and partial thread, threaded rods are continuous threaded bars that can be cut to any desired length and used with standard nuts and washers at any position along the rod. This design provides maximum flexibility for applications requiring custom-length fasteners, adjustable mounting systems, and suspension assemblies. The rods are manufactured from carbon steel in Grade 4.8 and Grade 8.8, offering tensile strength options of 400 MPa and 800 MPa respectively, to meet the requirements of both light-duty and structural applications. The standard metric coarse thread profile ensures compatibility with all standard hex nuts, lock nuts, coupling nuts, and threaded fittings.

The LD-390 threaded rods are available in diameters from M6 to M24, with the most common sizes being M8, M10, and M12 for general-purpose applications. Standard supply length is 1 meter (1000mm), and rods can be easily cut on-site to any required length using a hacksaw, angle grinder, or power cutoff tool. Custom cut-to-length service is also available for orders, eliminating on-site cutting labor and ensuring clean, accurate cut ends. For applications requiring lengths longer than 1 meter, multiple rods can be joined using threaded coupling connectors (studding connectors) that internally thread onto the rod ends. The full-length thread allows for easy adjustment of nut positions, making threaded rods ideal for leveling, shimming, and adjustable-mount applications where precise positioning is required.

Surface finishing options include white/blue zinc plating, yellow zinc plating, black oxide, and plain finish. Zinc plating provides sacrificial corrosion protection with the zinc layer corroding preferentially to protect the underlying steel. White/blue zinc offers a clean bright finish for indoor applications, while yellow zinc provides enhanced corrosion resistance for outdoor and humid environments. Black oxide finish provides a uniform dark appearance with mild corrosion resistance, commonly used for indoor aesthetic applications and machinery where a non-reflective finish is preferred. For highly corrosive environments, stainless steel 304 and 316 options are available, offering superior corrosion resistance for marine, chemical, and food processing applications. All threaded rods are manufactured to DIN 975 dimensional standard, ensuring consistent thread pitch, diameter tolerance, and surface finish across all production batches.

Threaded rods are used across an exceptionally broad range of industries and applications due to their versatility, adjustability, and cost-effectiveness. Common applications include suspension and support systems for mechanical equipment, HVAC ductwork, and plumbing pipes; construction formwork tie rods for concrete pouring and temporary structures; machinery mounting, leveling, and alignment where adjustable-height fasteners are needed; plumbing and HVAC support installations where rods hang from ceilings to support pipes and ducts; electrical conduit and cable tray support systems; and custom-length fastening for specialized applications where standard bolt lengths are not available. With CE, ISO 9001, and DIN 975 certifications, the LD-390 threaded rod series delivers consistent quality and performance that professional contractors, mechanical installers, and OEM manufacturers rely on for their critical fastening and support applications.