Import Din 6915 Structural Nut — Buy in wholesale FOB from Supplier in China

The Din 6915 Structural Nut is a high-strength hexagonal nut designed for structural steel connections, manufactured to DIN 6915 and ISO 4032 standards. This listing specifies materials including carbon steel, alloy steel, and stainless steel, with mechanical grades 8, 10, and 12. Surface finishes are offered as plain, zinc-plated, or black oxide. Dimensions follow standard metric thread profiles for M12 to M36, with precise tolerances for hex width and thickness as defined in DIN 6915. These nuts are produced in Ningbo, China, with full traceability to raw material batches.

Material composition varies by grade: grade 8 uses medium-carbon steel with quenching and tempering, grade 10 employs alloy steel for enhanced tensile strength, and grade 12 uses high-strength alloy steel with strict hardness control. Typical industry tolerances for thread pitch diameter are ±0.15mm, and hex head thickness ranges from 1.1 to 1.3 times the nominal diameter depending on size. Surface treatments are applied to meet salt spray resistance expectations, with zinc plating offering up to 96 hours of corrosion resistance per ASTM B117. Stainless steel variants are typically AISI 304 or 316, though exact grade must be confirmed per order.

These nuts are commonly used in bridge construction, heavy machinery, wind turbine towers, and structural framing where high preload and shear resistance are required. Buyers include civil engineering contractors, industrial equipment manufacturers, and infrastructure project suppliers in Europe, North America, and Southeast Asia. Packaging is in cartons or plastic bags on pallets, with 100,000 pieces per month capacity. Lead time is typically 15 to 25 days after deposit, and delivery terms are FOB Shanghai or Ningbo. Minimum order quantity is not stated and must be confirmed directly.

Ningbo Steel Bolt Co., Ltd operates from Zhenhai District, Ningbo, China, with a manufacturing facility focused on industrial fasteners. The company is verified as a harbor-tier supplier, indicating established export experience and compliance with basic trade documentation. Response rate and average response time are not recorded in the listing, suggesting limited real-time buyer engagement. The supplier does not claim certifications such as ISO 9001, third-party testing, or client references, and no history of operation or workforce size is disclosed.

The company specializes in structural nuts, bolts, and related fasteners for export markets, with production capacity reported at 100,000 pieces per month. It does not state involvement in OEM supply chains, engineering support, or custom design services. Its offerings are limited to standard DIN and ISO products without indication of proprietary tooling or in-house R&D. Buyers should treat this as a production-focused supplier of standard components, not a technical partner.