Carriage Bolts DIN 603 (also called coach bolt) feature a smooth rounded head and square neck designed to prevent rotation during installation. The square neck locks into pre-drilled holes of wood or metal, ensuring reliable fastening and easy assembly without turning the bolt head. DIN 603 is a globally accepted metric standard that ensures consistent dimensions and fit for high-quality fastening solutions.
below to learn more about our products and customization options.
| DIN 603 | |
| M4–M36 | |
| 10–300 mm | |
| 4.8, 5.8, 8.8, 10.9, SS304, SS316 | |
| Zinc Plated / Hot-dip Galvanized / Black Oxide / Natural | |
Our carriage bolts are your reliable choice for various fastening needs. Constructed from high - quality steel, they ensure remarkable strength and long - lasting durability.
Carriage bolts DIN 603 feature a rounded head and a square neck. The rounded head offers an aesthetically pleasing look, while the square neck prevents rotation during tightening, providing a stable connection.
High-Quality Material
Made from premium stainless steel, these bolts resist corrosion and rust even in harsh environments. Their robust construction ensures long - term durability and reliable performance, making them ideal for both indoor and outdoor projects.
Available in an array of diameters and lengths, these bolts can meet the needs of any project, whether it's a small - scale DIY task or a large - scale industrial job.
Ideal for woodworking, construction, and machinery assembly, they firmly hold different materials together, thanks to their unique design with a rounded head and square neck.
Packed in user - friendly boxes or bags, they are easy to store, transport, and access. The packaging also safeguards bolts from damage, ensuring they're in top condition when you use them.
Hebei Sanwei Fasteners Co., Ltd. (hereinafter referred to as "Sanwei is a high-tech enterprise specializing in the research, development, production, and sale of fasteners, located in Hebei Province, China. Since its establishment,wei has been committed to providing customers with high-quality, high-performance fastener solutions, which are widely used in various fields such as construction, machinery manufacturing, automobile, and power communication.
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A: Our company produces a wide variety of bolts, mainly including carriage bolts, hex socket head cap screws, hex bolts, flange bolts, etc.
A: Our minimum order quantity (MOQ) varies depending on the bolt type. For standard hex bolts, the MOQ is typically 1,000 pieces per size. For specialty bolts like custom - designed anchor bolts, the MOQ is around 5,000 pieces due to the complexity of manufacturing. However, we're flexible.
A: Here are the key points for choosing the right bolt size. First, consider the application. For light - duty applications like furniture assembly, small - diameter bolts such as M4 or M6 are usually sufficient. In contrast, for heavy - duty machinery or structural connections, larger bolts like M12 or M16 might be required. Second, check the thickness of the materials to be joined. The bolt should be long enough to pass through all the components and allow for proper threading. As a general rule, the bolt length should be about 1.5 times the thickness of the materials. Finally, take into account the available space. If the installation space is limited, you may need to choose a shorter or thinner bolt to fit. In some cases, you might also need to consider the bolt's head type and drive style to ensure it can be properly installed and tightened.
A: Construction and Infrastructure Bridge Construction High-Rise Buildings Highways and Railways Machinery Manufacturing Industrial Equipment Agricultural Machinery Mining Machinery
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