- 50 pack of 304 stainless steel elastic pad spring washers (heavy elastic pad), compatible with bolt sizes M2–M30. - Smooth surface with good flexibility for easy seating and reduced surface damage. - High plasticity enabling uniform distance and uniform force, delivering stable elasticity under load and vibration. - Made from 304 stainless steel for corrosion resistance and durable performance in varied environments. - Size range M2 to M30 provides wide compatibility for common fasteners and applications. - Heavy elastic pad design offers reliable preload maintenance and vibration dampening to help prevent loosening. - Use scenarios: - Industrial machinery mounting where vibration can cause fastener loosening. - Automotive or motorcycle assemblies requiring durable preload and resistance to corrosion. - Home improvement or furniture projects needing stable, long-lasting fastener performance. - Includes 50 pieces for multipoint fastening needs. Place between bolt head or nut and mounting surface, then tighten to achieve desired preload.