Import 302 Stainless Steel Ball — Buy in Bulk from Supplier in China

The 302 stainless steel ball from Zhonshan H.R.T Precision Steel Ball Co., Ltd. is an austenitic stainless steel sphere manufactured for precision mechanical applications. The listing specifies a diameter of 4.7625mm (3/16 inch), with the supplier indicating a size range from 0.5mm to 50.8mm across their broader catalogue. Grade options span G10 to G1000, covering precision levels from master bearing quality down to commercial grades. The material is 302 stainless steel, an austenitic grade containing 17-19% chromium and 8-10% nickel typical for this alloy family, offering good corrosion resistance in moderately aggressive environments.

302 stainless steel provides moderate corrosion resistance and reasonable mechanical strength, though it is slightly less corrosion-resistant than 304 or 316 grades due to its lower nickel content. The balls carry a polished surface finish, reducing friction in bearing assemblies and improving aesthetic appearance in visible applications. Sphericity and surface finish vary by grade: G10 permits minimal deviation, while G1000 allows greater tolerance. Standard industry practice requires grade selection based on rotational speed, load, and environmental exposure. The 302 alloy is magnetic when cold-worked, a factor relevant to certain electronic and sensor applications where magnetic permeability matters.

These balls serve electronic components, precision instruments, automotive assemblies, and cosmetic dispensing mechanisms. Buyers include OEMs in medical devices, valve manufacturers, and producers of ball bearings for light-duty cycles. The supplier notes flexible MOQ and packaging designed for shipping protection. Payment terms include L/C and T/T. Response rate data is unavailable, so direct enquiry is needed to confirm lead times, exact MOQ, and current certification status. Buyers should verify lot consistency, dimensional certificates, and whether the stated grade aligns with their application requirements.

Zhonshan H.R.T Precision Steel Ball Co., Ltd. operates from No71, Shenchong Industrial Park, Zhongshan, Guangdong Province, postal code 528401, China. The supplier holds an imported tier classification on the platform with a harbor trust tier. Response rate is recorded at 0.00 percent with zero average response hours, indicating no historical response data is available through this channel. The company specialises in precision steel balls, with 302 stainless steel among their offered materials. No information is provided regarding year of establishment, factory floor space, employee count, annual revenue, or specific quality certifications held.

The listing does not state ISO certification directly held by this supplier, though the source text mentions ISO in a generalised manner. Buyers must independently verify any claimed certifications, audit reports, or testing capabilities. The address places the company in the Zhongshan manufacturing corridor of Guangdong, a region with established metalworking supply chains. There is no information about export experience, primary markets served, or named clients. The harbour trust tier suggests basic profile verification without extended validation. Direct communication is essential to assess production capacity, in-house metrology capabilities, and whether the supplier manufactures these balls directly or sources from subcontractors.