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Home Product Big Head Carriage Bolt M6*40 Square Neck Bolt for Woodworking & Construction
Big head carriage bolt M6*40

Big Head Carriage Bolt M6*40 Square Neck Bolt for Woodworking & Construction

Big head carriage bolt M6x40
Heavy-duty M6x40 carriage bolt
Large head M6x40 carriage bolt
Big head carriage bolt M6*40
Big head carriage bolt M6x40, heavy-duty design with large head for secure fastening in construction, machinery, and structural applications, providing high-strength load-bearing performance.
Categories:Fasteners & Fixings
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Product Description

The Big head carriage bolt M6x40 is a heavy-duty M6x40 carriage bolt engineered for robust structural applications in construction, machinery, and industrial equipment. This large head M6x40 carriage bolt features a 6mm diameter shank and 40mm length, crafted from high-strength carbon steel or corrosion-resistant stainless steel. Its oversized flat head ensures superior load distribution and prevents pull-through in wood, metal, or composite materials. The threaded section is compatible with M6 nuts and pre-drilled holes, ideal for high-vibration environments. With a galvanized or zinc-plated finish, it operates reliably in temperatures from -20°C to 120°C. Key advantages include durability and slip resistance, though the bulky head may limit use in space-constrained installations. Commonly deployed in automotive, shipbuilding, and infrastructure projects.
Parameter Specification
Product Type Big head carriage bolt M6x40
Thread Size M6 (Metric coarse thread)
Shank Length 40 mm
Head Style Oversized square undercut
Head Height 7.5 mm
Material Grade Class 8.8 steel
Surface Finish Hot-dip galvanized
Application Heavy-duty M6x40 carriage bolt for structural connections
Drive Type Slotted oval head
Load Capacity 1,200 kg tensile strength
Compliance ASTM A307 / ISO 898-1
Installation Large head M6x40 carriage bolt requires 13mm wrench
question:Do you offer technical selection services?
answer:Yes, we provide technical selection support to meet diverse client needs.
question:Do you have a professional product engineering team?
answer:Yes, our expert team handles product research, selection, and optimization.
question:Can you assist with technical specifications for products?
answer:Absolutely, we offer tailored technical specification guidance.
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 offer technical selection services?
answer:Yes, we provide technical selection support to meet diverse client needs.
question:Do you have a professional product engineering team?
answer:Yes, our expert team handles product research, selection, and optimization.
question:Can you assist with technical specifications for products?
answer:Absolutely, we offer tailored technical specification guidance.
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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