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Home Product Big Head Carriage Bolt M12x80 Coach Bolt Heavy-Duty Zinc Plated Construction Machinery Fastener
Big head carriage bolt M12*80

Big Head Carriage Bolt M12x80 Coach Bolt Heavy-Duty Zinc Plated Construction Machinery Fastener

Big head carriage bolt M12x80
Large head coach bolt M12x80
Heavy duty carriage bolt M12x80
Big head carriage bolt M12*80
Big head carriage bolt M12x80, also referred to as Large head coach bolt M12x80 or Heavy duty carriage bolt M12x80, features a smooth domed head with integrated square neck for anti-rotation, designed for construction, machinery, and woodworking applications. Made from high-strength material, M12 diameter, 80mm length.
Categories:Fasteners & Fixings
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Product Description

The Big Head Carriage Bolt M12x80, also known as a Large Head Coach Bolt M12x80 or Heavy Duty Carriage Bolt M12x80, is a robust threaded fastener designed for high-strength applications. Featuring a prominent domed head with a square neck (24mm head diameter, 5mm height) and M12x80 dimensions (12mm thread diameter, 80mm shank length), it ensures secure fastening by preventing rotation during installation. Constructed from hardened carbon steel or stainless steel with optional zinc plating, it operates in temperature ranges from -30°C to 120°C, suitable for heavy machinery, construction frameworks, agricultural equipment, and industrial assembly. Advantages include superior load distribution, corrosion resistance, and vibration resistance due to the square-neck design, while its larger head requires precise pre-drilled holes for installation. Not compatible with low-profile or electronic integration applications.
Parameter Specification
Thread Size M12x80
Total Length 80 mm (3.15 in)
Head Type Large Round Head with Square Neck
Material Carbon Steel / Stainless Steel A2/A4
Surface Finish Zinc Plated / Hot-Dip Galvanized
Tensile Strength Grade 5 (Carbon Steel) / A2-70 (Stainless)
Head Diameter 24 mm ±0.5
Head Thickness 8 mm ±0.3
Thread Engagement Length 50 mm (Minimum)
Applications Construction, Woodworking, Heavy-duty Fastening
Compliance Standards ASTM A307 / DIN 603 / ISO 10509
Alternative Names Large Head Coach Bolt M12x80, Heavy Duty Carriage Bolt M12x80
Square Neck Dimensions 10.5x10.5x4 mm
Surface Coating Thickness 8-12 μm (Zinc)
question:Do you have a professional product selection engineering team?
answer:Yes, we have a dedicated team of experienced engineers specializing in product selection and optimization.
question:What shipping methods do you support?
answer:We support DHL, Fedex, UPS, and other mainstream shipping methods for global delivery.
question:Why can other suppliers source discontinued models you can't?
answer:They may access unauthorized refurbished units or excess stock, which we avoid to ensure quality compliance.
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:Do you have a professional product selection engineering team?
answer:Yes, we have a dedicated team of experienced engineers specializing in product selection and optimization.
question:What shipping methods do you support?
answer:We support DHL, Fedex, UPS, and other mainstream shipping methods for global delivery.
question:Why can other suppliers source discontinued models you can't?
answer:They may access unauthorized refurbished units or excess stock, which we avoid to ensure quality compliance.
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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