Import Disc Springs — Buy in Bulk from Supplier in China

Disc springs supplied by Yangzhou Sunzo Spring Ind.Co., Ltd. are conical washers engineered to deliver high load capacity in compact spaces, conforming to DIN2093 and GB/T1972-2005 standards. They are manufactured from alloy steels including 50CrV4 and 60Si2MnA, and stainless steels such as SUS301 and SUS304, selected for fatigue resistance and load stability. These springs are designed for axial compression applications where consistent force is required over repeated cycles.

The springs are produced using cold forming from precision coil stock, followed by heat treatment to achieve a martensitic microstructure. 50CrV4 offers higher tensile strength and is typical for high-stress environments, while 60Si2MnA provides good ductility and is widely used in China for general industrial springs. Stainless variants offer corrosion resistance without compromising load performance. Surface finish is typically untreated or phosphate-coated unless specified otherwise.

These components are commonly used in automotive clutch systems, valve actuators, aerospace landing gear, and industrial clamping fixtures. Buyers include OEM manufacturers, maintenance departments, and engineering firms sourcing replacement or custom components. Packaging is usually bulk cartons with internal separators to prevent scratching. Trade terms such as FOB and CIF are available, but minimum order quantities and lead times require direct confirmation with the supplier.

Yangzhou Sunzo Spring Ind.Co., Ltd. is a manufacturer based in Yangzhou, Jiangsu Province, China, with a registered address at Room 501, #428 Kaixuan Building. The company is listed as an imported supplier with harbor-level trust verification, indicating active export activity and compliance with basic export documentation. The supplier profile does not disclose company size, years in operation, or client names, and response metrics are not available on the listing.

The business focuses on precision spring components, including disc springs, Belleville washers, and custom-formed springs. It does not claim ISO certification, in-house testing labs, or third-party quality audits. Production appears to be capacity-driven with standard tooling for DIN and GB standards. Buyers should request material certificates and load test reports directly before placing orders, as no certifications are stated in the listing.