Dacromet Hex Washer Head Self Drilling Screw With EPDM Washer

1.Products Details:

These Dacromet-coated self-drilling screws are high-performance fasteners engineered for exceptional corrosion resistance, validated by 1000-hour salt spray test compliance (per ASTM B117 standards).

2.Key Features:

• Dacromet Coating: A pollution-free, inorganic ceramic coating (composed of zinc/aluminum flakes in a chromium-based matrix) that forms a dense, self-repairing protective barrier. Unlike traditional plating, it avoids hydrogen embrittlement (critical for high-strength applications) and resists solvents, gasoline, and extreme temperatures (up to 300°C/572°F).

• 1000-Hour Salt Spray Resistance: The coating delivers 7–10x better corrosion protection than standard zinc plating, enduring 1000+ hours of neutral salt spray exposure without red rust—ideal for marine, coastal, or outdoor environments.

• Self-Drilling Design: Integrates a sharp, drill-point tip to eliminate pre-drilling, enabling fast installation in metal, wood, or composite materials (paired with a bonded washer for enhanced sealing in roofing/construction uses).

3.Technical Parameters of Hex Self Drilling Screw

4.Certificate Display

5.Production Process

6.Packaging and shipping Details

Ningbo Yongbiao Fastener Manufacturing Co., Ltd. is located in Ningbo, the second largest port city in China. The factory is 50 kilometers away from Ningbo Port and can reach the sea freight warehouse in one hour, with very fast logistics. The company was founded in 2012 and after years of hard work and development, it has become a factory covering an area of over 2000 square meters with a registered capital of 6.8 million yuan. So far, the company has two holding subsidiaries and has gradually developed into a medium-sized fastener manufacturing enterprise integrating research and development, production, and sales. Currently, the factory has more than 50 employees and complete production and testing equipment, including more than 50 production equipment and more than 10 testing equipment. The factory has an annual production capacity of 4000-5000 tons of fasteners and an annual output value of 40-50 million RMB. Our products have a normal delivery time of 20-30 days and a stock time of 1-5 days. Our independent brand "YB" accepts OEM, ODM. Our main products include various fasteners, standard parts, bolts, screws, wood screws, self tapping screws, turning screws, combination screws, nuts, accessories, flat washers, lifting rings, etc. In addition, we also have multiple CNC lathes and milling machines to provide customized fastener services for customers. The company's products are mainly used in the fields of automobiles, machinery, electronic equipment, sheet metal, security, new energy, etc., and have been widely praised by domestic and foreign customers. Welcome new and old customers to inquire.