introduction to products：
Hex bolts with nuts and spring washers: They are in the shape of a cylindrical rod with a hexagonal head. One end has threads matching the nut, and the nut has a hexagonal shape for wrench operation. The spring washer is in a wave - like or coiled shape. Made of metal materials like carbon steel, stainless steel, etc., they are cost - effective, reliable in connecting parts. The spring washer provides elasticity and prevents the nut from loosening due to vibration. They have different corrosion resistance and mechanical properties. They are widely used in machinery, construction, automotive, industrial equipment and other fields for fastening components, assembling structures and ensuring the long - term stability of connections.
Instructions for Use：
Hex bolts with nuts and spring washers are fasteners consisting of a hex - headed bolt, a matching nut, and a spring washer. The bolt has a threaded shaft for engaging with the nut, and the spring washer, placed between the nut and the fastened part, has a springy structure. The outer diameter of the bolt head and the inner diameter of the nut match standard wrench sizes. During installation, first put the spring washer and nut on the bolt, then pass the bolt through the pre - drilled holes of the parts to be fastened, and tighten the nut using a wrench. The spring washer exerts elastic force to prevent the nut from loosening due to vibration.
Hebei Duojia Metal Products Co., Ltd. was formerly known as Yonghong Expansion Screw Factory. It has over 25 years of professional experience in manufacturing fasteners. The factory is located in the China Standard Room Industrial Base - Yongnan District, Handan City. It conducts online and offline production and manufacturing of fasteners as well as one-stop sales service business.
The factory covers an area of over 5,000 square meters, and the warehouse covers an area of over 2,000 square meters. In 2022, the company carried out industrial upgrading, standardized the production order of the factory, improved the storage capacity, enhanced safety production capacity, and implemented environmental protection measures. The factory has achieved a preliminary green and environmentally friendly production environment.
The company has cold pressing machines, stamping machines, tapping machines, threading machines, forming machines, spring machines, crimping machines, and welding robots. Its main products are a series of expansion screws known as "wall climbers".
It also produces special-shaped hook products such as wood tooth welding sheep eye ring screws and machine tooth sheep eye ring bolts. In addition, the company has expanded new product types from the end of 2024. It focuses on pre-buried products for the construction industry.
The company has a professional sales team and a professional follow-up team to safeguard your products. The company guarantees the quality of the products it offers and can conduct inspections on the grades. If there are any problems, the company can provide professional after-sales service.
Our export countries include Russia, South Korea, Britain, France, Germany, Italy, Canada, Mexico,Brazil, Argentina, Chile, Australia, Indonesia, Thailand, Singapore, Saudi Arabia, Syria, Egypt, Tanzania.Kenya and other countries. Our products will be spread all over the world!
WHY CHOOSE US?
1.As a factory-direct upplier,we eliminate middleman margis to offer you the most competitive pricing for high-quality fasteners.
2.our factory pass the ISO 9001 and AAA certification .we have the hardness testing and the test of zinc coating thickness for galvanized products.
3.with full contrl over production and logistic,we guarantee on-time delivery even for urgnt orders .
4.our engineering team can customize faseners from prototype to mass production , including unique thread designs and anti-corrosion coatings.
5.From carbon steel hex bolts to high-tensile anchor bolts ,we provide a one-stop solution for all your fastener needs.
6.If any defect is found ,we’ll reship replacements within 3weeks of our cost .
