Import Din 603 Carriage Bolt — Buy in wholesale FOB from Supplier in China

The Din 603 carriage bolt is a fully threaded fastener with a domed head and square neck, designed for wood-to-metal applications where a flush surface is required. This listing specifies material options including carbon steel, stainless steel, and alloy steel, with mechanical grades 4.8, 6.8, 8.8, and 10.9. Finishes include plain, zinc-plated, and black oxide, each offering different corrosion resistance levels. Dimensions follow the DIN 603 standard, with diameters ranging from M6 to M24 and lengths from 20mm to 200mm, consistent with European engineering norms.

Carbon steel variants meet ISO 898-1 tensile requirements, while stainless steel options typically use A2 or A4 grades for corrosion resistance. The square neck prevents rotation during installation, a key feature for structural assemblies. Surface treatments are applied after machining; zinc plating provides moderate protection, black oxide offers minimal rust inhibition but improved aesthetics, and plain finishes suit dry or coated environments. These bolts are not heat-treated after plating, so grade integrity relies on pre-treatment material selection.

These bolts are commonly used in agricultural machinery, timber framing, and light industrial equipment where vibration resistance and secure fastening are critical. Buyers include manufacturers of farm implements, pallet rack systems, and outdoor furniture. Packaging is in cartons or plastic bags on pallets, with monthly supply capacity at 100,000 pieces. Trade terms are typically FOB Shanghai or Ningbo, with T/T payment preferred. MOQ is not stated; buyers should confirm minimum order quantities directly with the supplier.

Ningbo Steel Bolt Co., Ltd is a manufacturer based in Zhenhai District, Ningbo, Zhejiang, China, with direct access to port logistics via Shanghai and Ningbo. The company operates under a harbor-tier trust status, indicating verified factory registration and production capacity. There is no public data on years in operation, employee count, or annual revenue. The listing confirms production capability and export experience but does not state certifications, client names, or quality management systems.

The supplier focuses on industrial fasteners, primarily carriage bolts, hex bolts, and custom studs. Response rate and average response time are not recorded, suggesting limited or no active sales team engagement on the platform. Buyers should treat this as a direct factory source but verify all technical claims and packaging details before placing orders. No claims about ISO certification, laboratory testing, or third-party audits are made in the source data.