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Home Product Big Head Carriage Bolt M8x22 | Oval Head Coach Bolt Stainless Steel Heavy-Duty Construction Fastener
Big head carriage bolt M8*22

Big Head Carriage Bolt M8x22 | Oval Head Coach Bolt Stainless Steel Heavy-Duty Construction Fastener

Big head carriage bolt M8x22
M8x22 large head bolts
Oversized head coach bolt M8
Big head carriage bolt M8*22
Big head carriage bolt M8x22, M8x22 large head bolts, or oversized head coach bolt M8. Designed for secure fastening in woodworking and construction. Enlarged head prevents rotation, ensuring a firm grip. Corrosion-resistant finish.
Categories:Fasteners & Fixings
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Product Description

The Big head carriage bolt M8x22, also known as M8x22 large head bolts or Oversized head coach bolt M8, features a 22mm shank length with 8mm diameter thread. Designed for heavy-duty fastening in mechanical assemblies and construction applications, its enlarged domed head provides superior load distribution and tamper-resistant characteristics. Typically manufactured from grade 5.8 carbon steel or A2/A4 stainless steel, these bolts withstand working temperatures from -20°C to +120°C. The square neck beneath the head prevents rotation during installation, making them ideal for securing components in machinery, automotive frameworks, and structural steel connections. Key advantages include vibration resistance and no-tool grip design, though requiring slightly larger installation clearance. Surface treatments like zinc plating or hot-dip galvanization enhance corrosion resistance for outdoor industrial use.
Parameter Specification
Product Type Big head carriage bolt M8x22
Thread Size M8 (8mm nominal diameter)
Length 22mm under-head measurement
Head Style Oversized domed head with square neck
Head Diameter 16mm ±0.2mm
Square Neck Width 8.2mm ±0.1mm
Material Grade Carbon steel Grade 4.8
Surface Treatment Zinc-plated (5-8μm)
Thread Pitch 1.25mm coarse thread
Tensile Strength 420 MPa minimum
Torque Capacity 20-24 N·m dry installation
Compliance Standard ISO 7411 / DIN 603
question:Why is the shipping cost so high? Are there cheaper options available?
answer:Shipping costs depend on weight, destination, and carrier. We provide economy shipping options—contact us for details.
question:Why was the label removed from the product upon delivery?
answer:Labels may be cut for customs clearance or regulatory compliance. Contact us if quality concerns arise.
question:What does the warranty cover?
answer:The warranty covers manufacturing defects. Duration varies by product; refer to documentation or contact support.
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 the shipping cost so high? Are there cheaper options available?
answer:Shipping costs depend on weight, destination, and carrier. We provide economy shipping options—contact us for details.
question:Why was the label removed from the product upon delivery?
answer:Labels may be cut for customs clearance or regulatory compliance. Contact us if quality concerns arise.
question:What does the warranty cover?
answer:The warranty covers manufacturing defects. Duration varies by product; refer to documentation or contact support.
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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