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Home Product Big head carriage bolt M8*55 | Large Head Coach Bolt, Heavy-Duty Fastener, Galvanized Steel Construction Hardware
Big head carriage bolt M8*55

Big head carriage bolt M8*55 | Large Head Coach Bolt, Heavy-Duty Fastener, Galvanized Steel Construction Hardware

Big head carriage bolt M8x55
Large head coach bolt M8x55
M8x55 heavy duty carriage bolt
Big head carriage bolt M8*55
Big head carriage bolt M8x55, also known as Large head coach bolt M8x55 or M8x55 heavy duty carriage bolt. Stainless steel construction for corrosion resistance, designed for construction, machinery, and woodworking. Features dome-shaped wide head for load distribution and square neck to prevent rotation during tightening.
Categories:Fasteners & Fixings
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Product Description

The Big head carriage bolt M8x55, also referred to as Large head coach bolt M8x55 or M8x55 heavy duty carriage bolt, is a robust mechanical fastener designed for structural applications in construction, industrial machinery, and automotive assembly. Featuring an M8 (8mm) diameter and 55mm shank length with full threading, it incorporates an oversized domed head for superior load distribution and surface protection. Typically manufactured from high-grade steel or stainless steel (A4-80), it withstands tensile strengths up to 800 MPa and operates reliably in temperatures ranging from -50°C to +150°C. Ideal for heavy-duty connections requiring vibration resistance, this bolt excels in environments demanding corrosion-resistant hardware. While devoid of electronic components like input/output ports, communication interfaces, or battery capacity, its mechanical durability and compatibility with standard M8 nuts make it indispensable for permanent fixtures. Installation requires appropriate torque tools to avoid head deformation during tightening.
Parameter Specification
Product Model Big head carriage bolt M8x55, Large head coach bolt M8x55
Alternate Names M8x55 heavy duty carriage bolt
Nominal Diameter 8 mm
Thread Pitch 1.25 mm (Standard coarse thread)
Length 55 mm (Under-head measurement)
Head Type Large domed head with square neck
Material Carbon steel (Grade 8.8) / Stainless steel (A2/A4)
Surface Treatment Zinc-plated (Electro-galvanized) / Plain stainless
Standards DIN 603 / ISO 10642 compliant
Application Structural fastening, furniture assembly, heavy-duty machinery
Package Type Bulk-packed (100 pcs/box)
question:Does the company have a professional product selection engineering team?
answer:Yes, we have a skilled team analyzing market trends and quality standards to optimize product selections for client needs.
question:Can I apply for low-value declaration when shipping products?
answer:Low-value declaration eligibility depends on destination country regulations. Contact our logistics team for guidance on specific cases.
question:What is the warranty policy?
answer:Our warranty covers manufacturing defects, with duration varying by product. Detailed terms are provided at purchase confirmation.
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:Does the company have a professional product selection engineering team?
answer:Yes, we have a skilled team analyzing market trends and quality standards to optimize product selections for client needs.
question:Can I apply for low-value declaration when shipping products?
answer:Low-value declaration eligibility depends on destination country regulations. Contact our logistics team for guidance on specific cases.
question:What is the warranty policy?
answer:Our warranty covers manufacturing defects, with duration varying by product. Detailed terms are provided at purchase confirmation.
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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