Import Din6921 Hex Flange Bolt — Buy in Bulk from Supplier in China

DIN6921 hex flange bolts from Handan Daoning Fasteners Co., Ltd. are produced in metric and imperial sizes, ranging from M6 to M20 and 1/4 inch to 3/4 inch, with material options including carbon steel, alloy steel, stainless steel, and brass. These bolts feature a 12-point flanged head for even load distribution and are manufactured to DIN 6921, ISO 15071, and GB 5787 standards. The supplier lists multiple strength grades, including SAE J429 Grade 5 and 8, ASTM A307 Grade A, and property classes 4.8 through 12.9.

Carbon steel bolts are heat-treated to achieve specified tensile strengths, while stainless variants use 304 or 316 material. Surface finishes include plain, zinc plated (clear, blue, yellow, black), black oxide, nickel, chrome, and hot-dip galvanized. The supplier states they use calipers, go/no-go gauges, tensile testers, and salt spray chambers for quality control, but does not specify test frequencies or pass/fail thresholds. Packaging is in bulk cartons up to 25kg, often palletized.

These bolts serve structural steel, wind energy, oil and gas, and heavy machinery applications where high clamping force and vibration resistance are required. Buyers include construction contractors, industrial equipment manufacturers, and maintenance departments. The supplier accepts orders from 500kg per specification and offers samples free of charge. Trade terms include FOB, CIF, CFR, EXW, DDU, and DDP. Lead time and exact MOQ per size must be confirmed directly.

Handan Daoning Fasteners Co., Ltd. is located in Congtai District, Handan, Hebei, China, and operates as a manufacturer and exporter of industrial fasteners. The supplier lists production capacity at 1,000 tons per month and accepts orders from 500kg per specification. There is no public information on workforce size, years in operation, certifications, or client references. Their listing confirms the use of calipers, go/no-go gauges, tensile testers, and salt spray chambers, but does not state compliance with ISO 9001 or any other management system.

They offer free samples and technical support, suggesting some level of customer service capability. The supplier handles multiple international trade terms including FOB, CIF, DDP, and EXW, indicating experience in export logistics. However, no quality audit reports, test certificates, or material traceability details are provided. Buyers should request batch-specific test data before large orders, as the supplier does not claim formal certification.