Hot-Dip Galvanized Hex Head Bolt (DIN931 Half Thread / DIN933 Full Thread / GB30 Chinese National Standard Bolt, Can Be Equipped With Nut And Washer Set)

1. Applicable fields and export advantages

Wotu hot-dip galvanized hexagonal bolts are rigidly needed fasteners for infrastructure and are produced in strict compliance with DIN and GB general industrial standards. The product implementation scenarios cover outdoor engineering projects such as steel structure factories, power towers, bridge guardrails, photovoltaic brackets, engineering machinery, and oil and gas pipelines. After years of polishing in the foreign trade market, the products have been stably sold to the Middle East, Southeast Asia, Africa, Europe and other overseas regions. They meet the bulk purchasing needs of infrastructure projects and hardware traders in various countries and are the mainstream choice for fastening in open-air projects.

2. Raw materials and production processes

The raw material is high-quality carbon steel, which is divided into two categories: grade 4.8 general-purpose model and grade 8.8 high-strength model, which can meet different working conditions of light and heavy loads. The entire production chain is independently controlled, from wire rod pickling, cold heading integrated molding, to finished product screening and unified hot-dip zinc plated. Compared with conventional zinc plated products on the market, hot-dip zinc plated has sufficient zinc layer thickness, greatly improved resistance to salt spray, acid rain, and salt-alkali corrosion. It is not prone to rust when exposed to the sun for a long time and in humid coastal environments, effectively reducing the cost of later maintenance and parts replacement.

3. Category differentiation and selection characteristics

The products are divided into three mainstream specifications: DIN931 half thread, DIN933 full thread, and GB30 Chinese national standard. Half-thread bolts have reserved smooth rod sections and have excellent shear resistance, and are mainly used for splicing steel beams and embedded fixing of heavy equipment; full-thread bolts are fully threaded, and the installation and locking distance can be adjusted freely, suitable for equipment assembly and light steel frame construction; Chinese national standard GB30 specifications are suitable for a large number of overseas procurement markets that follow domestic standards, with complete styles and flexible selection. The matching washers and nuts are hot-dip galvanized at the same time, and the sizes are exactly the same. They can be purchased individually or shipped as a set of bolts and washers.

4. Quality control warehousing and customized services

The factory has set up a standardized quality inspection process to randomly inspect the outer dimensions, zinc layer adhesion, and product hardness of each batch to eliminate undesirable problems such as slipping, zinc skin peeling, and excessive tolerances. M6-M48 regular specifications are always in stock. Small-batch samples and full-container bulk export orders can be quickly arranged for packaging and shipment. We can provide selection guidance and fastening matching solutions according to customer project conditions, customize special length and special specification products as needed, and flexibly change the outer packaging style. Relying on mature production capacity and strict quality control, long-term stable supply is the best choice for cost-effective overseas project procurement.