Features: This 66 piece carbon steel rivet nut set features 3mm to 10mm mandrels for versatile fastening, crafted from strong high carbon steel with anti erosion treatments to withstand heavy duty applications in both household and industrial environments. The complete set includes 10 nut per size (3mm -10mm) with accuracy engineered threading, offering outstanding shear strength (45 50 hardness) and plated surfaces that resist rust in humid conditions. Ideal for both professional technicians requiring stable fastening solution and enthusiasts tackling home improvement projects like cabinet assembly or machinery maintenance. Perfect for securing metal frameworks in construction projects, automotive undercarriage repairs, and furniture installations where shaking resistant, long lasting connection are critical. simplify your workshop inventory with this comprehensive 66pc set every coated carbon steel nut undergoes rigorous to secure consistent thread engagement and load bearing capacity up to 8.8 grade standards. Specifications: Component : carbon steel Package Includes: 66pcs Rivet nut note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.