Import Din3570 U Bolts — Buy in Bulk from Supplier in China

The DIN3570 U Bolts from Handan Daoning Fasteners Co., Ltd. are manufactured in carbon steel, alloy steel, and stainless steel, conforming to the DIN3570 standard. Sizes range from 1/4 inch to 1 inch (M6 to M30), with thread types including metric, UNC, and UNF. The bolts are produced to mechanical grades such as SAE J429 Grade 2, 5, 8 and ISO classes 4.8, 6.8, 8.8, 10.9, and 12.9, indicating varying tensile and yield strength levels.

Surface finishes include plain, zinc plated (clear, blue, yellow, black), black oxide, nickel, chrome, and hot-dip galvanized. These finishes determine corrosion resistance and suitability for outdoor or high-moisture environments. The bolts are produced using cold forging and threading processes, with dimensional tolerances aligned with DIN3570. The supplier uses calipers, go/no-go gauges, and tensile testers to verify dimensions and strength.

These U bolts are commonly used in structural steel framing, oil and gas pipelines, wind turbine towers, and automotive suspensions. Buyers in construction, renewable energy, and heavy machinery industries source these for anchoring and securing applications. The supplier offers a monthly capacity of 1000 tons and accepts minimum orders of 500kg per specification. Trade terms include FOB, CIF, CFR, EXW, DDU, and DDP, with payment via T/T or L/C.

Handan Daoning Fasteners Co., Ltd. is located in Handan, Hebei Province, China, at Room103, 6/F, Jishan Apartment, Ring Road No. 26, Congtai District. The supplier is verified as a harbor-tier entity, indicating basic platform compliance. No company history, workforce size, or export volume is disclosed. The listing confirms production equipment including calipers, go/no-go gauges, tensile testers, and salt spray testers.

The supplier focuses on DIN-standard fasteners, particularly U bolts, and claims to supply material and test reports. There is no mention of ISO certification, internal quality systems, or third-party audits. Response rate and average response time are zero, suggesting limited buyer communication. Buyers should independently verify material traceability and mechanical test data before large orders.