Import Bolt — Buy in Bulk from Supplier in China

Yonglian Metal Official supplies carbon steel and alloy steel bolts from its base in Qingdao, Shandong Province. The bolts are offered in a spread of inch and metric diameters, typically from M6 to M24, with lengths ranging from 20 mm to 200 mm depending on the grade and thread pitch specified. Surface finishes include plain oil, zinc plating, and hot-dip galvanising to suit different exposure conditions. The supplier lists construction, automotive assembly, and general machinery as the primary end-use sectors.

Material grades commonly available for this product category include ASTM A307 Grade A and B for low-carbon steel applications, ASTM A325 for structural steel connections, and ASTM A490 for higher-strength alloy steel joints. ISO 4014 and ISO 4017 cover the dimensional tolerances for hex head bolts, while DIN 933 and DIN 931 remain standard references in European procurement. Tensile strength varies with grade: A307 bolts typically yield 414 MPa minimum, whereas A490 bolts reach 1,039 MPa minimum tensile strength. Thread classes 6g (metric) and 2A (inch) are standard factory tolerances. Corrosion protection is specified by coating thickness and salt-spray hours, with hot-dip galvanising typically delivering 50-85 microns of zinc thickness and 500-hour salt-spray resistance.

Buyers are typically contractors, steel fabricators, and OEM machinery builders who need batch consistency and mill-test documentation. The bolts are used in structural steel framing, conveyor systems, vehicle chassis assemblies, and agricultural equipment. When sourcing from Yonglian Metal Official, buyers should confirm the exact grade, finish, and mechanical-property certificates required for their project, because the listing does not specify stocked grades or current MOQ.

Yonglian Metal Official is located at 34/F International Trade Center, Huangdao, Qingdao, Shandong Province, China. The supplier is classified as an imported-tier vendor on the platform with a harbor trust rating. The response rate is listed at 0.00% and the average response time is recorded as zero hours, which indicates that the supplier has not yet engaged with buyer enquiries through the platform messaging system. Buyers should therefore anticipate that initial contact may require follow-up via the provided address or alternative channels.

The listing describes Yonglian Metal Official as offering bolts for construction and manufacturing applications, with emphasis on protective finishes and straightforward installation. No verified factory size, year of establishment, annual revenue, or named client base is stated in the source data. Buyers are advised to request a company profile, business licence, and quality-system documentation directly from the supplier before committing to a first order.