New Star Industries is among the leading Heavy Hex Nuts Manufacturers in India, supplying high-strength structural nuts for one of the most demanding bolting systems in civil engineering — High Strength Friction Grip (HSFG) connections. In an HSFG joint, the bolt, nut, and washer work together as a matched set, using clamping force alone (not shear) to transfer load between structural members, which is exactly why every component in that set has to be manufactured to exacting, certified standards.
An HSFG nut — also known as a Heavy Hex Nut, HR Nut, or HV Nut depending on the assembly system — has to develop and hold the full preload tension of the bolt without any loss in clamping friction at the joint. We manufacture our heavy hex nuts in grades 8 and 10, conforming to EN 14399-3, IS 6623, and ASTM A563, with optional zinc flake coating for long-term corrosion protection in exposed structural applications.
✓ Built for HSFG Bolting Systems: Manufactured to work as part of a matched high-strength friction grip assembly, where consistent clamping tension across every bolt in a structure is critical.
✓ Multi-Standard Compliance: Conforming to EN 14399-3, IS 6623, and ASTM A563, allowing us to supply structural steel projects working to European, Indian, or American design codes from a single production line.
✓ High Strength Grades: Available in grades 8 and 10, matched to the load-bearing demands of bridges, steel structures, and heavy infrastructure projects.
✓ Zinc Flake Coating Option: Optional zinc flake coating provides enhanced, long-term corrosion protection for structures exposed to outdoor and harsh environmental conditions.
✓ Metric and Inch Thread Options: Produced in sizes from M12 to M36 with both metric and inch threads, covering the range specified across major structural steel design standards.
Heavy hex nuts from New Star Industries are widely used in bridges, steel structures, and infrastructure projects where high-strength friction grip bolting is specified — applications where load-bearing reliability, dimensional accuracy, and long-term durability are all non-negotiable requirements of the design.
Beyond our standard EN 14399-3, IS 6623, and ASTM A563 range, New Star Industries manufactures heavy hex nuts as per customer specification, including custom sizes, grades, and coatings. Share your drawing with our team, and we'll manufacture to your exact requirement.
For bulk orders, technical drawings, or coating recommendations, get in touch with our team directly.
