Import Flat Washer Structural Washer — Buy in wholesale FOB from Supplier in China

The Flat Washer Structural Washer offered by Ningbo S D Metalwork Co., Ltd is a flat gasket type component designed for load distribution in bolted joints. It conforms to model number f436 and is fabricated from carbon steel with a raw material designation of 45kc. The washer is supplied in diameters ranging from 1/2 inch to 1 1/2 inches, covering common structural sizes. Surface finishes include plain, black, zinc‑plated, zinc (yellow) plated, hot‑dip galvanised (h.D.G.) and Dacromet coating.

The grade identified as F436 aligns with the ASTM F436 specification commonly used for structural applications. Typical industry practice for this class of washer includes a tensile strength of around 500 MPa and a hardness of 140 HB, which provide adequate resistance to deformation under static loads. Standard dimensional tolerances are ±0.02 inch for outer diameter and ±0.01 inch for inner bore, ensuring compatibility with standard bolts. Suppliers often ship the washers in bulk cardboard cartons or metal trays, each containing 500 pieces, to facilitate handling.

These washers are routinely employed in construction, bridge fabrication, heavy machinery and steel‑frame structures where uniform pressure distribution is critical. Importers such as fabricators, contract manufacturers and infrastructure contractors typically request FOB Ningbo or CIF Shanghai terms, though exact conditions should be confirmed with the supplier. The minimum order quantity is not disclosed in the listing, so buyers should verify the required volume directly with Ningbo S D Metalwork Co., Ltd. Payment methods commonly accepted include L/C and T/T, but specifics must be agreed during negotiation.

Ningbo S D Metalwork Co., Ltd is based in Ningbo, Zhejiang Province, China, with the postal code 315114. The company is listed under the harbour trust tier and currently shows a zero percent response rate, indicating that enquiries may require follow‑up to obtain a reply. Its registered address places it close to the major export hub of Ningbo port, facilitating efficient shipment of bulk hardware items.

The supplier’s catalogue focuses on structural flat washers and related fastener components. While the listing provides detailed specifications for the F436 washer, it does not disclose production capacity, MOQ or pricing, prompting buyers to request that information directly. The company positions itself as a source for engineering‑grade washers suitable for construction and heavy‑industry projects.