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Metric Stainless A4 (316) Carriage Bolt, DIN 603
Our Metric Stainless Steel A4 (316) Carriage Bolts manufactured to DIN 603 are corrosion‑resistant fasteners engineered for secure, non‑rotating installation in demanding environments. Made from A4 stainless steel (316 equivalent), these carriage bolts offer superior resistance to chlorides, saltwater, chemicals, and harsh outdoor conditions—making them ideal for marine, coastal, food‑processing, chemical, and architectural applications.
The DIN 603 carriage bolt design features a smooth, domed round head with a square neck underneath the head. The square neck pulls into the mating material during installation to prevent bolt rotation, allowing tightening from the nut side only. This design provides a clean finished appearance and reliable holding strength in wood, composites, and prepared metal applications where corrosion resistance is critical.
Designed for durability and long service life, A4 Stainless DIN 603 Metric Carriage Bolts are widely used in marine construction, outdoor structures, processing equipment, stainless fabrications, and industrial assemblies exposed to moisture or corrosive conditions. The 316 stainless material resists pitting and crevice corrosion better than A2 (304) stainless, making it a preferred choice for severe environments. Available in a full range of metric diameters and lengths, these carriage bolts deliver dependable fastening with a clean, professional finish and premium stainless performance.
