About Ningbo Songhe Fastener Co., Ltd. - Nuts Supplier in China

Based in China, Ningbo Songhe Fastener Co., Ltd. currently lists five distinct fastener items in its catalogue. The product set covers both bolts and nuts, including a carriage bolt conforming to DIN 603 and ISO 8677, a hexagon head bolt, standard hexagon nuts, hexagon domed cap nuts, and hexagon flange nuts. Each item falls under the HS chapter 73 family for threaded fasteners, which is commonly used for classification of bolts and nuts in international trade. The catalogue does not specify additional product attributes such as material grade or finish. The supplier is classified as an imported, harbor‑tier supplier in the platform’s trust system.

Product Range and Specialties of Ningbo Songhe Fastener Co., Ltd.

From the catalogue, Ningbo Songhe Fastener offers a carriage bolt (DIN 603 / ISO 8677), a hexagon head bolt, standard hexagon nuts, hexagon domed cap nuts, and hexagon flange nuts. In the fastener market, such items are usually manufactured from carbon steel, alloy steel, or stainless steel, and are supplied in grades ranging from 4.6 up to 10.9 for bolts, with corresponding hardness and tensile strength values defined by ISO 898‑1. Hexagon nuts and cap nuts are commonly provided in the same strength class as the mating bolts to ensure joint integrity. Typical HS code for these products is 7318.15 (bolts, screws, nuts of iron or steel). Buyers often select finishes such as zinc plating, hot‑dip galvanizing, or black oxide to improve corrosion resistance, especially for automotive or outdoor applications. Dimensional standards like thread pitch and head height follow the DIN or ISO references indicated, which helps align with global engineering drawings. The catalogue does not list specific dimensions, so purchasers should verify size, thread designation, and material grade before placing orders.

Trade and Export Information - Ningbo Songhe Fastener Co., Ltd.

China is a major global exporter of threaded fasteners, with the majority of shipments classified under HS chapter 73, particularly sub‑heading 7318 for bolts, screws and nuts. Exporters from the Zhejiang region, where Ningbo is located, typically serve markets in Southeast Asia, Europe, and North America, supplying automotive manufacturers, machinery assemblers, and construction firms. Standard export documentation includes a commercial invoice, packing list, and a mill test certificate that confirms compliance with the referenced DIN or ISO standards. Common Incoterms used are FOB Ningbo Port or CIF destination, depending on buyer preference.

Importers usually require quality management certification such as ISO 9001 and product‑specific certifications like CE marking for fasteners used in EU machinery, or ASTM A307/A325 compliance for structural applications. While the supplier’s certifications are not listed, buyers should request any available quality system certificates and a material test report for each batch. Fasteners are generally packed in cardboard boxes or wooden crates, with each box labeled by size and HS code, and stacked on standard 20‑ft or 40‑ft containers for sea freight.

Sourcing from Ningbo Songhe Fastener Co., Ltd. - Buyer Guidance

Prospective buyers should obtain a mill test certificate that details the chemical composition, tensile strength, hardness, and compliance with DIN 603 or ISO 8677 for the carriage bolt. For hexagon nuts and cap nuts, verification of thread tolerance class (e.g., 6g/6H) and matching strength grade to the intended bolt is essential. Requesting a sample batch with the intended finish (zinc, galvanised, etc.) allows visual inspection and dimensional verification before confirming larger volumes.

Because the catalogue does not specify minimum order quantities or lead times, buyers need to ask the supplier for production capacity and typical delivery schedules, which for Chinese fastener manufacturers often range from 2 to 6 weeks for standard items. Confirm packaging details, such as the number of pieces per box and pallet configuration, to ensure efficient handling upon arrival. Ensure that shipping terms, documentation, and any required import certifications are agreed in advance to avoid customs delays.

What fastener types are listed in the catalogue?

The catalogue lists a carriage bolt (DIN 603 / ISO 8677), a hexagon head bolt, standard hexagon nuts, hexagon domed cap nuts, and hexagon flange nuts.

Which HS code family applies to these products?

All items fall under HS chapter 73 for iron or steel threaded fasteners, most specifically sub‑heading 7318.15 for bolts, screws and nuts.

What standards are referenced for the carriage bolt?

The carriage bolt is referenced to DIN 603 for head shape and ISO 8677 for thread dimensions, both European standards for metric fasteners.

What material grades are typical for these kinds of fasteners?

Typical material grades include carbon steel grades 4.6 to 10.9 for bolts, with corresponding alloy or stainless steel options depending on corrosion requirements. Matching nuts are usually supplied in the same strength class as the bolts.

Which certifications should a buyer request from the supplier?

Buyers should request a mill test certificate, any ISO 9001 quality‑management certificate, and product‑specific certifications such as CE marking or ASTM compliance if the fasteners are intended for regulated markets.

How are the fasteners usually packaged for export?

Fasteners are commonly packed in cardboard boxes or wooden crates, labeled by size and HS code, and then loaded onto standard 20‑ft or 40‑ft containers for sea freight.

What are typical lead times for standard fasteners from China?

Standard production and delivery for Chinese fastener manufacturers generally range from two to six weeks after order confirmation, depending on order size and finish.

How can I request a sample before placing a larger order?

Contact the supplier directly to ask for a pre‑shipment sample set that includes the intended finish and size range; the sample should be accompanied by a mill test certificate for verification.