Import A490m 10s High Tensile Bolt — Buy in wholesale FOB from Supplier in China

The A490m 10s High Tensile Bolt is a heavy-duty structural fastener designed for applications requiring superior clamping force and shear resistance. This bolt features a hexagon head style for straightforward installation with standard tools, and it is manufactured to a grade 10.9 specification, delivering a minimum tensile strength of 1000 MPa with a yield strength of 900 MPa. The black finish provides a base level of corrosion resistance, while optional zinc plating offers additional protection for outdoor or humid environments.

The material composition is typically medium-carbon alloy steel, heat-treated to achieve the required mechanical properties. Bolt dimensions for this grade commonly range from M12 to M36, with thread pitches and shank lengths tailored to structural steel applications. The A490m designation aligns with ASTM standards for high-strength structural bolting, ensuring compatibility with North American and international construction codes. Surface irregularities are held to standard tolerances for structural fasteners, with thread fit conforming to ISO 724 metrics.

These bolts are primarily used in steel frame construction, bridge building, and heavy machinery assembly where load-bearing joints must withstand dynamic stresses. Structural engineers and contractors in infrastructure projects rely on them for connections in steel beams, columns, and trusses. Buyers typically source these in bulk with packaging options such as palletized cartons or steel drums to prevent damage during transit. Confirm MOQ, lead time, and Incoterms directly with Ningbo S D Metalwork Co., Ltd, as these are supplier-specific.

Ningbo S D Metalwork Co., Ltd is based in Ningbo, Zhejiang Province, China, with its registered address in the 315114 postal district. The company is classified under the harbor trust tier, indicating a verified operational presence and compliance with basic trade verification checks. While no response rate or average response time is currently recorded, the supplier’s profile confirms its focus on high-strength fasteners for industrial and construction markets.

The supplier specializes in the production and export of structural bolts, including high-tensile grades like the A490m series. Its product range caters to sectors such as construction, automotive, and heavy machinery, where precision and durability are critical. The profile does not list certifications, client references, or production capacity, so buyers should request these details directly to assess suitability for their projects.