Import Din931/Din933 Hex Bolts Factory In China — Buy in Bulk from Supplier in China

Din931 and Din933 hex bolts from Yongnian Yundu Fastener Co., Ltd. are manufactured in compliance with DIN, ASTM, GB, ISO, and BSW standards, with sizes ranging from M6 to M100 and 1/4" to 4". These bolts are produced in carbon steel, stainless steel, and alloy steel variants, with surface finishes including plain, black oxide, zinc plated, hot dipped galvanized, phosphating, and copper plating. Grade options span from 4.8 to 12.9, covering low to high tensile strength requirements. The supplier confirms direct manufacturing capability and a monthly output of 300 metric tons.

The carbon steel variants typically meet DIN 931 for fully threaded bolts and DIN 933 for partially threaded bolts, with mechanical properties aligned with ISO 898-1. Zinc plating thickness is typically 5 to 25 microns, and hot dipped galvanizing follows ISO 1461 with a minimum coating weight of 610 g/m². Phosphating is applied as a corrosion-resistant undercoat for subsequent painting. Material composition conforms to standard EN 10083 for alloy steels and EN 10025 for carbon steels where applicable.

These bolts serve construction, oil and gas, marine, and heavy machinery applications where structural integrity under load is critical. Buyers include engineering contractors, industrial equipment manufacturers, and infrastructure project suppliers. Packaging is offered in cartons or gunny bags, stacked on wooden pallets per client specification. Delivery for a full container load is typically within 15 days after order confirmation.

Yongnian Yundu Fastener Co., Ltd. operates from the Liuying Industrial Zone in Yongnian County, Hebei Province, a region known in China as the capital of fasteners. The company identifies as a direct manufacturer with over 10 years of export experience, producing bolts, nuts, and custom fasteners for international markets. The supplier's listing confirms manufacturing capability and volume output but provides no details on workforce size, revenue, or client names.

No certifications such as ISO 9001 or product-specific compliance are stated in the source data. The supplier's trust tier is listed as harbor and tier as imported, indicating it is recognized as a verified exporter on the platform but without third-party audit disclosures. Response rate and average response time are not available, suggesting limited buyer interaction history on the platform.