Import Astm A325 Heavy Hex Bolt — Buy in wholesale FOB from Supplier in China

The ASTM A325 Heavy Hex Bolt is a structural steel bolt designed for high-strength connections in steel frameworks and heavy construction. Manufactured to ASTM A325 standards, this bolt delivers the tensile strength and shear resistance required for critical load-bearing joints. The heavy hex head provides greater wrenching area than standard hex bolts, reducing the risk of head stripping during high-torque installation. Ningbo Beilun Milfast Metalworks Co., Ltd. supplies these bolts from Zhejiang Province, China, with a hot-dip galvanized finish for corrosion protection in exposed environments.

ASTM A325 specifies medium-carbon steel bolts heat-treated to achieve minimum tensile strength of 120 ksi (827 MPa) for diameters up to 1 inch, and 105 ksi (724 MPa) for diameters from 1 to 1.5 inches. The heavy hex head conforms to ASME B18.2.6 dimensional standards, with head height and width substantially greater than standard hex configurations. Hot-dip galvanizing applies a zinc coating typically 50-85 micrometres thick per ASTM A153, providing sacrificial corrosion protection that outlasts mechanical zinc plating in atmospheric exposure. Thread length follows ASTM A325 specifications: 2D + 0.25 inches for bolts 6 inches and under, and 2D + 0.5 inches for longer bolts, where D equals nominal diameter.

These bolts serve structural steel fabrication, bridge construction, industrial machinery assembly, and heavy civil engineering projects where slip-critical or bearing-type connections are specified. Buyers include steel erectors, bridge contractors, OEM equipment manufacturers, and infrastructure project procurement teams. The supplier indicates flexible ordering quantities and offers FOB and CIF shipping terms. Payment methods include L/C and T/T. Buyers should confirm exact diameter and length requirements, grip length calculations, and whether fully threaded or partially threaded configurations are needed for their specific connection designs.

Ningbo Beilun Milfast Metalworks Co., Ltd. operates from Qijiashan Street in the Lianhe Area of Beilun District, Ningbo, Zhejiang Province, China. The company lists as an imported-tier supplier on the1 the marketplace with a harbor trust tier classification. The supplier's response rate shows 0.00 percent with zero average response hours recorded, which indicates no response history is currently available through the platform. Buyers should initiate direct contact to assess communication responsiveness and English-language capability before relying on platform messaging alone.

unpackinging what the profile does not state: no factory size, employee count, annual output, year of establishment, or specific certifications (ISO, IATF, etc.) are listed. No client references, export markets, or case studies appear in the available data. The supplier's specialization in heavy hex bolts and structural fasteners is inferred from the product listing rather than stated in a broader company description. Buyers should request company registration documents, quality system certificates, and factory audit reports directly. The Beilun District location places the supplier within Ningbo's established metalworking and port logistics corridor, which supports steel fastener manufacturing and export activity, though this geographic advantage should not substitute for direct supplier verification.