Hot-Dip Galvanized Chinese National Standard Flat Washer (GB/T97.1A Level Flat Washer)

1. Product application and execution standards

This product is produced in compliance with GB/T97.1-2002 Class A flat washer Chinese national standard. It is an essential accessory for bolt fastening systems. It is widely used in steel structures, power towers, photovoltaic brackets, road and bridge infrastructure, engineering machinery, pipeline equipment and other engineering projects. It is suitable for the assembly and use of various DIN bolts. It is exported in batches to the Middle East, Southeast Asia, Africa, and European overseas markets all year round. During installation, the pad is placed between the nut and the workpiece, which plays the core role of dispersing the compression stress, protecting the contact surface of the workpiece, and filling the assembly gap.

2. Raw materials and processing technology

The raw material is made of high-quality Q235 steel sheet, which is integrally formed by CNC stamping. The product has high flatness and no burrs or warping. Surface anti-corrosion treatment is carried out uniformly after stamping. The zinc layer of hot-dip galvanized flat washer is dense and uniform. Compared with ordinary zinc plated products, its salt spray resistance and acid and alkali corrosion resistance are greatly improved. The inner diameter, outer diameter, and thickness of the gasket are all aligned with Chinese national standard tolerances. The hole diameter and corresponding bolts are accurately matched, and the set fits tightly when tightened.

3. Surface technology and selection advantages

The products are available in multiple processes: the hot-dip galvanized version is suitable for outdoor, coastal saline-alkali, and outdoor infrastructure conditions, and is long-term rust resistance; blue-white zinc plated, color zinc plated has a bright appearance, excellent cost-effectiveness, and is mostly used for indoor equipment assembly; and the black oxide version is suitable for fastening the inner cavity of machinery. The thickened flat washer has stronger pressure-bearing capacity and is suitable for heavy-duty equipment and heavy-duty steel structures. The conventional standard thickness is suitable for general assembly, and its multiple specifications cover the needs of all light and heavy-load scenarios.

4. Quality control warehousing and supporting services

M6~M64 full range of specifications are always in stock. Regular orders are dispatched within 48 hours. Small-batch samples and full-container export orders can be accepted. The dimensional accuracy, flatness, and coating adhesion are randomly inspected before leaving the factory, and defective products with deformation and excessive dimensional tolerance are eliminated. It can be supplied in one-stop complete sets with the factory's self-produced bolts, hex nuts, and spring washers, saving customers the cost of multi-party procurement; it supports according to drawings or samples customized nonstandard special-shaped flat washer, and the thickness and inner and outer diameter dimensions can be adjusted as needed. Stable production capacity continues to ensure long-term replenishment for overseas customers.