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Home Product Big Head Carriage Bolt M8x75 Heavy-Duty Large Round Head for Machinery Construction Furniture Assembly
Big head carriage bolt M8*75

Big Head Carriage Bolt M8x75 Heavy-Duty Large Round Head for Machinery Construction Furniture Assembly

Big head carriage bolt M8x75
M8x75 large head bolt
Heavy duty carriage bolt M8-75
Big head carriage bolt M8*75
Big head carriage bolt M8x75, also known as M8x75 large head bolt, is a heavy duty carriage bolt M8-75 featuring oversized circular head and square neck for rotation resistance. Zinc-plated finish ensures corrosion resistance, suitable for construction, woodworking, and industrial applications.
Categories:Fasteners & Fixings
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Product Description

The Big Head Carriage Bolt M8x75, also known as the M8x75 Large Head Bolt or Heavy Duty Carriage Bolt M8-75, features a 13mm diameter enlarged domed head and 8mm shaft diameter with 75mm length. Constructed from grade 8.8 carbon steel with zinc-plated corrosion resistance, it delivers 800MPa tensile strength for structural applications in construction, machinery, and automotive industries. The square neck beneath the head prevents rotation during installation, compatible with standard M8 nuts and 13mm wrenches. Operates reliably in temperatures from -30°C to 120°C, supporting static loads up to 12kN. Designed for permanent fixtures requiring vibration resistance and high torque stability, though installation requires pre-drilled square holes. Complies with ASTM A307 and ISO 898-1 standards, typically sold in bulk packaging.
Parameter Specification
Product Designation Big head carriage bolt M8x75 / M8x75 large head bolt / Heavy duty carriage bolt M8-75
Material Grade Carbon steel Grade 8.8
Thread Size M8 x 1.25 mm pitch
Length (L) 75 mm ±1.5mm
Head Type Oversized domed head with square neck
Head Diameter 24 mm ±0.5mm
Head Height 4 mm ±0.3mm
Neck Dimensions 13 mm square base x 6 mm height
Surface Treatment Zinc-plated (5-8μm) per ASTM B633
Tensile Strength ≥800 MPa
Proof Load 20.1 kN
Torque Specification 40-45 N·m dry installation
Applications Structural wood connections, heavy machinery assembly, truck body building
Standards Compliance DIN 603 / ISO 10509 / ANSI-ASME B18.5
Package Quantity 100 pieces per carton (bulk packed)
question:Why choose your company for purchases?
answer:As Asia's leading industrial automation trader with 20 years' expertise, we guarantee quality, reliability, and 85% repeat clients due to trusted reputation.
question:Can you ensure stable product supply?
answer:Yes, our long-term partnerships with manufacturers and efficient supply chain ensure timely delivery to support your business continuity.
question:What payment methods do you accept?
answer:We accept TT, PayPal, and other mainstream payment methods for secure and flexible transactions.
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 choose your company for purchases?
answer:As Asia's leading industrial automation trader with 20 years' expertise, we guarantee quality, reliability, and 85% repeat clients due to trusted reputation.
question:Can you ensure stable product supply?
answer:Yes, our long-term partnerships with manufacturers and efficient supply chain ensure timely delivery to support your business continuity.
question:What payment methods do you accept?
answer:We accept TT, PayPal, and other mainstream payment methods for secure and flexible transactions.
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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