High-performance fastening solutions engineered for critical infrastructure and structural steel connections.
LOADSTAR High Strength Friction Grip (HSFG) Bolts are precision-engineered structural fasteners designed for critical bolted connections in steel structures, bridges, and railway infrastructure. Unlike conventional bolts that rely on shear and bearing, HSFG bolts work by applying a controlled pre-tension that generates powerful clamping forces between the connected plates. This friction-based load transfer mechanism prevents joint slip, even under dynamic or cyclic loads, making them the preferred choice for safety-critical applications.
LOADSTAR Heavy Hex Nuts are high-strength structural nuts manufactured specifically to pair with HSFG bolt assemblies. With a larger bearing surface and greater width across flats compared to standard hex nuts, heavy hex nuts distribute clamping loads more uniformly across the joint — reducing the risk of surface damage and improving connection reliability in demanding structural applications.
LOADSTAR HN Plain Washers (Nut Face Washers) are hardened flat washers designed for placement under the nut in HSFG bolted assemblies. They protect the connected steel surface from damage during tightening and provide a consistent, hard bearing surface that ensures accurate torque-to-tension transfer throughout the tightening process.
LOADSTAR HR Chamfered Washers (Bolt Face Washers) are precision-machined hardened washers installed under the bolt head in EN 14399 System HR assemblies. The chamfer on the inner bore accommodates the bolt's fillet radius, ensuring full and flush contact between the washer and the bolt head — a critical requirement for achieving the correct load distribution and consistent preload in high-strength structural connections.
LOADSTAR Direct Tension Indicators (DTIs) are specialised hardened washers that provide a simple, reliable, and tamper-evident method of verifying that the correct bolt preload has been achieved in an HSFG assembly. Unlike torque-based methods — which measure rotational resistance rather than actual bolt tension — DTI washers directly confirm the clamping force in the joint, eliminating uncertainty from friction variation and tool calibration errors.
LOADSTAR Shear Connector Studs are headed weld studs engineered to create composite action between steel beams and concrete slabs. When arc-stud welded to the top flange of a steel girder, shear connector studs interlock the steel and concrete elements so that they behave as a single composite unit — significantly increasing the load-bearing capacity, stiffness, and overall efficiency of the structural system.
