China Lead Screw Strength Hardened Black Phosphating Flat Head Drywall Screws

China Lead Screw Strength Hardened Black Phosphating Flat Head Drywall Screws. Customized Surface Finish: Available in Zinc Plated, Ruspert, Dacromet, and other finishes based on customer requirements. Customized Packing Options: Flexible packing solutions including bulk packing or small boxes packing. Diverse Material Selection: Available in Carbon Steel C1022 and Stainless Steel 304/316/410. Standard Compliance: Manufactured according to DIN, IFI standards, or customer-specific drawings. ISO Certification: Products meet ISO certification standards for quality assurance. OEM and ODM Services: Full customization available from samples and designs with professional engineering support. Fast Delivery for Stock Items: Stock items can be delivered within 2-5 days. Free Samples for Regular Items: Free samples provided for regular screws (courier charges excluded).