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Home Product Big Head Carriage Bolt M6*20 | Dome Head Coach Bolt for Furniture Assembly, Construction & Automotive Use
Big head carriage bolt M6*20

Big Head Carriage Bolt M6*20 | Dome Head Coach Bolt for Furniture Assembly, Construction & Automotive Use

big head carriage bolt m6x20
M6-20 coach bolt with large head
heavy duty carriage screw 6mmx20mm
Big head carriage bolt M6*20
Big Head Carriage Bolt M6x20 (M6-20 Coach Bolt with Large Head) - Heavy-duty 6mmx20mm carriage screw for woodworking, construction, and industrial applications. Features large domed head and square neck design to prevent rotation during installation. Durable material ensures reliable fastening in demanding environments.
Categories:Fasteners & Fixings
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Product Description

The heavy duty carriage screw 6mmx20mm, also known as a big head carriage bolt M6x20 or M6-20 coach bolt with large head, is designed for robust fastening in construction, machinery, and structural assemblies. This bolt features a domed, enlarged head (13mm diameter) with a square neck to prevent rotation during installation. Manufactured from Grade 5 steel with a galvanized finish, it offers tensile strength up to 1200 MPa and operates reliably in temperatures ranging from -40°C to 120°C. Ideal for securing wood-to-metal or heavy-duty joints, its 20mm shank length and 6mm diameter ensure secure anchoring. Advantages include high shear resistance and corrosion protection, though pre-drilled holes are required for installation. This bolt is unsuitable for electronic systems, lacking interfaces or power specifications, but excels in mechanical applications demanding vibration resistance and durability.
Parameter Specification
Product Name Big Head Carriage Bolt M6x20, M6-20 Coach Bolt with Large Head, Heavy Duty Carriage Screw 6mmx20mm
Material Carbon Steel (Grade 8.8) / Stainless Steel (A2/A4)
Thread Size M6 (6mm)
Length (Shank) 20mm
Head Type Large Domed Head (Round Head with Square Neck)
Head Diameter 12mm
Square Neck Size 8mm x 8mm
Thread Pitch 1.0mm (Standard Coarse Thread)
Surface Finish Zinc Plated (Corrosion Resistance) / Hot-Dip Galvanized
Tensile Strength ≥800 MPa (Grade 8.8) / ≥500 MPa (A2-70)
Standards DIN 603, ISO 7380, ASTM F568
Application Wood-to-Metal Fastening, Structural Framing, Heavy Machinery
Drive Type Hexagonal Drive or Square Drive (Depending on Installation Tool)
Total Length (Incl. Head) ≈23mm (Head Height: 3mm)
question:How will after-sales handle cases where refurbished products are found during usage?
answer:We offer free replacement or refund upon verification. Please contact support with evidence and order details.
question:What shipping methods are supported?
answer:We support DHL, Fedex, UPS, and other major carriers. Shipping options vary by region and product type.
question:Why are products received with cut labels?
answer:Cut labels prevent unauthorized resale. Products are brand-new and genuine. Full warranty and functionality are unaffected.
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 will after-sales handle cases where refurbished products are found during usage?
answer:We offer free replacement or refund upon verification. Please contact support with evidence and order details.
question:What shipping methods are supported?
answer:We support DHL, Fedex, UPS, and other major carriers. Shipping options vary by region and product type.
question:Why are products received with cut labels?
answer:Cut labels prevent unauthorized resale. Products are brand-new and genuine. Full warranty and functionality are unaffected.
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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