Friction Grip Nut M22x1.5 8.8 MF

High Strength Friction Grip (HSFG) nuts are specialized, heavy-duty fasteners used with matching high-tensile bolts (commonly grades 8.8 or 10.9) to create secure, pre-tensioned structural connections. Unlike standard nuts that rely on shear strength, these nut assemblies clamp steel plates together, creating high friction that resists movement and fatigue in bridges, girders, and heavy structural joints.