Flange Lock Nut

Built-in integral flange face replaces separate flat washers. The enlarged contact area evenly distributes fastening pressure, greatly improving resistance to vibration loosening compared with standard round nuts, ideal for dynamic vibration working conditions.

As a thin locking jam nut, it is commonly paired with primary nuts for double-nut mechanical locking. Slim body saves installation space, perfectly suited for confined assembly gaps and limited-structure positioning.

• Grade 4.8 & 5.8: For light-duty fastening on hardware, household appliances and general light machinery
• Grade 8.8 & 10.9 High Tensile Grade: For heavy-load scenarios including construction machinery, automotive chassis, steel structures and rail transit, delivering outstanding tensile and shear resistance.

• ZP (White Zinc Plating): Cost-effective basic rust protection for dry indoor environments
• YZ (Yellow Zinc Plating): Superior salt spray resistance for humid outdoor and semi-exposed operating areas
• BLACK (Black Oxide): Suitable for high-temperature mechanical equipment, hydraulic components and precision machinery, stable under high heat with moderate anti-rust performance