Carriage bolt refers to the fastener composed of head and screw. Bolts can be divided into carbon steel bolts and stainless steel bolts according to the material. They need to be matched with nuts to fasten and connect two parts of through holes. The common specifications are M5-M20, length 15mm-300mm,and the grades are 4.8, 6.8, 8.8, 10.9 and 12.9. We can do the standard of GB DIN ASTM ANSI, The thread have coarse thread and fine thread, surface treatment includes: galvanized, yellow zinc, black and hot galvanized, we can customize the packaging according to the customer’s requirements. Handan Yongnian District ZhanyuYu Fastener Manufacturing Co., Ltd. is located in Tiexi Industrial Zone, Yongnian District, Hebei Province, covering an area of more than 7000 square meters, registered capital of 5million yuan and more than 120 employees. Our company adopts Taiwan advanced machine, many institutions certification, various honorary certificates. We have many years of experience in fastener production, sales and export, relying on professional technical knowledge and good faith management, we are committed to providing high-quality products and services to our customers.