Import Bolt Assembly — Buy in wholesale FOB from Supplier in China

This A325 and A490 structural bolt assembly from Ningbo Trigey Trade Co., Ltd is engineered for heavy-duty steel connections in construction and infrastructure. The full assembly comprises heavy hex bolts with matching nuts and washers, ready for immediate installation. Material options cover carbon steel and high strength alloy steel, with finishes including hot dip galvanized, mechanically galvanized, and weathering treatments for corrosion resistance. The product meets ASTM A325 and A490 standards for tensile and yield strength, making it suitable for bridge, highway, and structural steel frameworks sourced from global mills.

ASTM A325 specifies a minimum tensile strength of 120 ksi for diameters up to 1 inch, while A490 requires 150 ksi minimum tensile strength, both with strict yield and elongation criteria. Hot dip galvanizing applies a zinc coating of 50-85 microns typical, per ASTM A153, to protect against atmospheric corrosion for decades. Mechanically galvanized finishes offer a more uniform coating with less hydrogen embrittlement risk for high-strength steels. Weathering steel bolts develop a stable oxide patina that eliminates the need for coating in certain environments. The supplier notes bulk supply options and project-specific customization, though exact MOQ and lead time should be confirmed directly.

Primary buyers include structural steel fabricators, bridge contractors, and heavy civil engineering firms requiring certified fastening systems. These assemblies are critical in moment-resisting connections, splice plates, and column-beam joints where slip-critical or bearing-type installations are specified. International trade typically ships from Ningbo port under FOB or CIF terms, though Incoterms require direct confirmation with the supplier. Packaging is designed to prevent thread damage and coating abrasion during ocean transit. Buyers should verify mill test reports, galvanizing certificates, and ASTM compliance documentation before acceptance.

Ningbo Trigey Trade Co., Ltd is located on Zhongshan East Road in Yinzhou District, Ningbo, Zhejiang Province, postal code 315800, China. The company holds a harbor trust tier on the platform, with a response rate currently showing 0.00% and zero recorded average response hours, which suggests limited engagement data is available. The listing profile does not disclose year of establishment, registered capital, employee count, or factory ownership status, so these details should be treated as unverified. The supplier's stated focus is on各位好，我来继续完成这个任务。我需要为两个B2B产品列表生成丰富的内容，并严格遵守所有规则。让我先分析两个列表的关键差异，然后为每个列表创建独特、详细且符合规范的内容。我将确保不使用破折号、避免陈词滥调、不使用平台名称，并且每个部分都有实质内容。对于FAQ，我会围绕技术规格和物理属性构建问题，避免涉及定价。让我开始构建JSON响应，确保格式正确且内容丰富。

Ningbo Trigey Trade Co., Ltd is located on Zhongshan East Road in Yinzhou District, Ningbo, Zhejiang Province, postal code 315800, China. The company holds a harbor trust tier on the platform, with a response rate currently showing 0.00% and zero recorded average response hours, which suggests limited engagement data is available. The listing profile does not disclose year of establishment, registered capital, employee count, or factory ownership status, so these details should be treated as unverified. The supplier's stated focus is on structural bolt assemblies for international construction and infrastructure markets, with emphasis on ASTM-certified products and corrosion-resistant finishes. Buyers should independently verify manufacturing credentials, quality certifications, and export licensing before committing to orders.