Qbh Carbon Steel DIN557 Fastener Square Nuts

Qbh Carbon Steel DIN557 Fastener Square Nuts. DIN 557 Standard Compliance: Manufactured strictly according to DIN 557 standard with high accuracy and international quality. Wide Grade Range: Available in classes 3.6 to 12.9, including 4.8, 5.8, 6.8, 8.8, 10.9, and 12.9. Customizable Surface Finish: Options include Hot-Dipped Galvanized, Zinc Plated, Black, and other coatings. High Torque Resistance: Square geometry provides greater surface area for higher torque and loosening resistance. Flexible Size Options: Sizes range from M5 to M20 to meet various fastening requirements. Professional Quality Control: Strict inspection at every production link with MTC and mill certificates provided. Competitive Pricing: Cost-effective solutions with competitive factory prices and professional supply. Fast Delivery Service: Stock items delivered in 2-5 days; bulk orders in 18-25 days with priority production.