
Industrial Porca Parafuso Grade Porca M22 Cap Nut Hex Head Nut. Wide Grade Range: Available in Carbon Steel grades 4.8, 6.8, 8.8, 10.9, and 12.9 for diverse strength needs. Customizable Finish: Surface treatments include Black Oxide, Zinc Plating, Geomet, and Dacroment options. OEM/ODM Service: Professional manufacturer accepting OEM and ODM orders with competitive pricing. Strict Quality Control: In-house lab conducts chemical, mechanical, and corrosion resistance tests on all items. Fast Delivery: Standard lead time is 30-35 days after deposit; free samples available for standard fasteners. ISO Certified: Factory holds ISO9001, ISO45001, and ISO14001 certifications for quality assurance. Large Capacity: 30,000 sqm production base with complete in-house processes from wire drawing to packaging. Global Experience: 30 years of experience exporting to North America, Europe, Asia, and other global markets.