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Home Product Big Head Carriage Bolt M12*20 - DIN 603 Oval Head Square Neck Bolt, Galvanized Heavy Duty Fastener for Construction
Big head carriage bolt M12*20

Big Head Carriage Bolt M12*20 - DIN 603 Oval Head Square Neck Bolt, Galvanized Heavy Duty Fastener for Construction

Big head M12x20 carriage bolt
M12x20 heavy duty bolt
Large head M12x20 bolt
Big head carriage bolt M12*20
Big head M12x20 carriage bolt designed for heavy-duty applications. Features a large head for secure fastening and M12x20 thread specification. Heavy-duty construction bolt with enhanced load-bearing capacity. Ideal for industrial machinery, structural assemblies, and automotive applications. Zinc-plated surface resists corrosion.
Categories:Fasteners & Fixings
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Product Description

The Big head M12x20 carriage bolt is a robust heavy-duty fastening solution designed for demanding industrial applications such as machinery assembly, structural construction, and rail systems. This M12x20 heavy-duty bolt features a 12mm diameter, 20mm shank length, and an oversized domed head for secure load distribution and anti-slip performance. Constructed from high-grade carbon steel with optional zinc plating or hot-dip galvanization, it operates effectively across temperatures from -30°C to 150°C. The large head M12x20 bolt excels in vibration-resistant connections for equipment bases, vehicle frames, and infrastructure projects, offering superior shear strength up to 800 MPa. While its substantial design ensures reliable torque retention, the increased head profile may require specialized installation tools in confined spaces. Compatible with M12 nuts and standard 19mm wrench sizes, this fastener meets DIN 603 specifications for industrial hardware.
Parameter Specification
Product Model Big head M12x20 carriage bolt
Material Carbon steel (Grade 5)
Finish Zinc-plated
Head Type Large dome head with square neck
Thread Diameter M12 (12mm)
Length 20mm (total under-head length)
Head Diameter 24mm
Standards ASTM A307, ISO 898-1
Tensile Strength Minimum 800 MPa
Square Neck Dimensions 19mm x 5mm (width x height)
Torque Capacity Up to 120 Nm
Application Heavy-duty structural connections
question:What payment methods do you accept?
answer:We accept TT, PayPal, and other mainstream payment methods.
question:What shipping methods do you offer?
answer:We support DHL, FedEx, UPS, and other mainstream shipping methods.
question:Can I request a sample before bulk order?
answer:Yes, samples are available with applicable fees and shipping costs.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
question:What payment methods do you accept?
answer:We accept TT, PayPal, and other mainstream payment methods.
question:What shipping methods do you offer?
answer:We support DHL, FedEx, UPS, and other mainstream shipping methods.
question:Can I request a sample before bulk order?
answer:Yes, samples are available with applicable fees and shipping costs.
question:Can the company ensure stable product supply?
answer:Yes, we maintain long-term partnerships and strict inventory management.
question:Why is there a transaction fee?
answer:The fee covers payment processing and administrative costs for secure transactions.
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