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Home Product Big Head Carriage Bolt M10*120 - Heavy-Duty Galvanized Steel Coach Bolt for Construction & Outdoor
Big head carriage bolt M10*120

Big Head Carriage Bolt M10*120 - Heavy-Duty Galvanized Steel Coach Bolt for Construction & Outdoor

Big head carriage bolt M10x120
Large head carriage bolt M10
M10x120 big head bolt
Big head carriage bolt M10*120
Big head carriage bolt M10x120, large head carriage bolt M10, and M10x120 big head bolt with oversized domed head design. Made of galvanized steel for corrosion resistance, features square neck under wide head for anti-rotation. Ideal for wood-to-metal fastening applications requiring enhanced load distribution.
Categories:Fasteners & Fixings
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Product Description

The Big head carriage bolt M10x120 is a heavy-duty fastener designed for robust structural applications. Featuring a large head carriage bolt M10 design with a 10mm diameter and 120mm shank length, it offers enhanced load distribution through its wide, domed head. This M10x120 big head bolt is typically constructed from high-grade carbon steel with hot-dip galvanized coating, providing tensile strength up to 800 MPa and corrosion resistance for operation in -40°C to 150°C environments. Its design excels in construction, agricultural machinery, and rail infrastructure where vibration resistance and surface protection are critical. The oversized head prevents pull-through in soft materials while requiring adequate clearance space, which may limit use in confined areas. Proper installation requires matching square-neck washers to prevent rotation during tightening. This bolt type lacks electrical components, communication interfaces, or power requirements, focusing purely on mechanical fastening performance.
Parameter Specification
Product Designation Big head carriage bolt M10x120; Large head carriage bolt M10; M10x120 big head bolt
Thread Size (Metric) M10
Total Length 120 mm
Head Type Oversized rounded head with square neck
Material Grade Carbon steel, Grade 5 / Class 8.8 equivalent
Surface Finish Zinc-plated (5-8 µm) or Hot-dip galvanized
Square Neck Dimensions 13 mm x 13 mm (W x H)
Head Diameter 20 mm ±0.5 mm
Torque Capacity 65-85 Nm (dry threads)
Thread Pitch 1.5 mm (coarse thread)
Drive Type Square neck recess (anti-rotation design)
Compliance Standards DIN 603, ISO 10511, ASTM A307
question:Why is a service fee charged?
answer:The service fee covers transaction processing, order management, and customer support to ensure seamless operations.
question:Can I self-pickup goods via official courier booking?
answer:No, all shipments are handled directly by our logistics partners to guarantee delivery efficiency and security.
question:Why can't discontinued models be sourced, but other suppliers offer them?
answer:We prioritize verified suppliers for quality assurance, while others may use unverified channels risking product authenticity.
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:Why is a service fee charged?
answer:The service fee covers transaction processing, order management, and customer support to ensure seamless operations.
question:Can I self-pickup goods via official courier booking?
answer:No, all shipments are handled directly by our logistics partners to guarantee delivery efficiency and security.
question:Why can't discontinued models be sourced, but other suppliers offer them?
answer:We prioritize verified suppliers for quality assurance, while others may use unverified channels risking product authenticity.
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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