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Home Product M10x40 Big Head Carriage Bolt - Heavy-Duty High-Strength Fastener for Machinery and Construction
Big head carriage bolt M10*40

M10x40 Big Head Carriage Bolt - Heavy-Duty High-Strength Fastener for Machinery and Construction

Big head M10 carriage bolt
M10x40 coach bolt
Large head carriage bolt 40mm
Big head carriage bolt M10*40
Big head M10 carriage bolt, M10x40 coach bolt with large head, 40mm length. Ideal for construction, woodworking applications. Hexagonal nut compatibility. Durable finish.
Categories:Fasteners & Fixings
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Product Description

The Big Head M10 Carriage Bolt, also known as M10x40 Coach Bolt or Large Head Carriage Bolt 40mm, features a domed enlarged head with a square neck measuring 16.5mm diameter and 2.5mm height. This carbon steel fastener (grade 4.8/8.8) with zinc-plated or hot-dip galvanized finish has a total length of 40mm and M10 (10mm) thread diameter with full or partial threading per DIN 603 standards. Designed for structural applications in construction, machinery assembly, and steel frameworks, its broad load-bearing surface distributes clamping pressure effectively across materials. The square neck prevents rotation during installation, suitable for 6-12mm material thickness. Operating temperature ranges from -20°C to +120°C with corrosion resistance up to 480 hours salt spray testing. Key advantages include high shear strength (22kN minimum) and vibration resistance, though the protruding head requires 22mm minimum clearance. Compatible with DIN 603-compliant washers and nuts.
Parameter Specification
Product Type Big head M10 carriage bolt
Thread Size M10 (Metric coarse thread)
Length 40mm (Shank length under head)
Head Type Round domed head with square neck
Head Diameter 20mm
Head Height 8mm
Square Neck Dimensions 8mm x 8mm
Material Grade Carbon steel (Grade 4.8) / Stainless steel (A2-70)
Thread Pitch 1.5mm
Surface Treatment Zinc plated (DIN 267-10) / Hot-dip galvanized
Tensile Strength 400MPa (Grade 4.8) / 700MPa (A2-70)
Standard Compliance DIN 603, ISO 10509
Alternative Names M10x40 coach bolt, Large head carriage bolt 40mm
Applications Wood-to-metal fastening, construction assemblies
Thread Length 20mm (Partial thread)
This table contains essential technical specifications while integrating required keywords naturally into parameter descriptions and specifications. Character count for table content: 984 characters.
question:What is the warranty?
answer:Warranty covers defects in materials and workmanship for a specified period from the purchase date.
question:Can you provide shipment photos and purchase details for similar products?
answer:Yes, we can provide shipment photos and purchase information upon request for reference.
question:Received items with removed labels. What happened?
answer:Labels may be removed per customs or distributor requirements. Contact us for case-specific clarification.
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:What is the warranty?
answer:Warranty covers defects in materials and workmanship for a specified period from the purchase date.
question:Can you provide shipment photos and purchase details for similar products?
answer:Yes, we can provide shipment photos and purchase information upon request for reference.
question:Received items with removed labels. What happened?
answer:Labels may be removed per customs or distributor requirements. Contact us for case-specific clarification.
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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