Ningbo Strong Bolt Trade Co., Ltd is located in Ningbo, China which is international city and with the biggest port in China. With our strict quality management and our persistent efforts, our products have been exported to many countries in Europe, South and North America, Australia, Middle East and Asia etc. Well received by domestic and foreign customers.
The width range of our products can be divided into auto fasteners, mechanical fasteners, construction fasteners, power fasteners, railway fasteners, household electrical appliances fasteners and chemical fasteners. Product standards including DIN, ANSI, ASTM, ISO, JIS, BS and customization by sample. The size range is from M3 up to M64 and 1/4" up to 4", max Length 1, 000mm by cold forged, hot forged and lathe machine.
The surface treatments are available for: Black Oxide, Gray Phosphate, Black Phosphate, Zinc, YZP, Black Zinc, Nickel, Chrome, Zinc-Nickel, HDG, Mechanical Galvanized, Wax, Dacromet and brass plated, etc. The mechanical performance class/grade of carbon steel are 4.8(4.6, 5.8), 8.8, 10.9, 12.9 according to DIN standard, and GR2, GR5, GR8, B7 according to ANSI standard; Stainless steel 201, 304, 316. Which are applied to wind-power screws series, steel structure bolts series and other non-standard components.