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Home Product M8×70 Big Head Carriage Bolt (Coach Bolt) Zinc-Plated Heavy-Duty for Construction & Machinery
Big head carriage bolt M8*70

M8×70 Big Head Carriage Bolt (Coach Bolt) Zinc-Plated Heavy-Duty for Construction & Machinery

Big head carriage bolt M8x70
M8x70 coach bolt
Large head M8 carriage bolts
Big head carriage bolt M8*70
Big head carriage bolt M8x70, also called M8x70 coach bolt, features a large domed head and square neck for secure wood-to-metal fastening. Galvanized steel Large head M8 carriage bolts with 70mm length suit construction, furniture, and outdoor projects.
Categories:Fasteners & Fixings
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Product Description

The Big head carriage bolt M8x70 (also known as M8x70 coach bolt or Large head M8 carriage bolts) features an 8mm diameter shank with 70mm length, designed with an enlarged domed head and square neck for secure anti-rotation fastening in wood-to-metal applications. Manufactured from grade 8.8 carbon steel with optional zinc plating, it operates under standard temperature ranges (-20°C to 120°C) and requires no power input. Typically used in construction, machinery assembly, and woodworking industries, its key advantages include high shear strength and slip-resistant installation. The 23mm head diameter provides enhanced load distribution, though pre-drilling is recommended for hard materials. This fastener lacks electronic components, communication interfaces, or battery specifications, being purely a mechanical hardware solution for structural connections requiring vibration resistance.
ParameterSpecification
Product NameBig Head Carriage Bolt
Thread SizeM8x70 (Metric 8mm diameter, 70mm length)
Head TypeLarge Domed Head with Square Neck
Head Diameter28mm
MaterialCarbon Steel (Grade 4.8/8.8)
Surface FinishZinc-Plated/HDG/Plain
Thread TypeFull/Partial Thread (Customizable)
Square Neck Dimensions13mm x 13mm
ApplicationWood-to-Metal Fastening, Structural Assembly
StandardsDIN 603, ISO 10509
Alternative NamesM8x70 Coach Bolt, Large Head M8 Carriage Bolts
PackagingBulk/Custom Packaging Available
question:How is after-sales service handled if a product malfunction is discovered to be refurbished?
answer:We guarantee immediate replacement or refund for refurbished items and investigate supply chain sources to prevent recurrence.
question:Does the company have a professional product selection engineering team?
answer:Yes, our expert engineering team selects products through rigorous analysis, industry experience, and market trend evaluations.
question:Can the company provide technical selection services?
answer:Yes, our engineers offer technical consultation and tailored solutions to meet your specific operational requirements.
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:How is after-sales service handled if a product malfunction is discovered to be refurbished?
answer:We guarantee immediate replacement or refund for refurbished items and investigate supply chain sources to prevent recurrence.
question:Does the company have a professional product selection engineering team?
answer:Yes, our expert engineering team selects products through rigorous analysis, industry experience, and market trend evaluations.
question:Can the company provide technical selection services?
answer:Yes, our engineers offer technical consultation and tailored solutions to meet your specific operational requirements.
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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