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DIN557 Stainless Steel Square Nut. Wide Material Options: Available in Stainless Steel, Carbon Steel, and Copper. Multiple Grade Standards: Offering Grade 4.8, 8.8, 10.9, and 12.9 to meet diverse needs. Extensive Surface Finishes: Options include Natural, Black, Zinc-plated, Nickel, Dacromet, and Hot-dip Galvanized. Fast Urgent Delivery: Urgent orders can be delivered within 7-15 days. OEM and ODM Services: Full customization available from samples or designs. Flexible Payment Terms: Accepts LC, T/T, D/P, PayPal, Western Union, and small-amount payments. Convenient Export Location: Factory is 35km from Ningbo Port for easy logistics. Strict Quality Control: Includes visual and function inspection with traceable raw materials.