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Home Product Big Head Carriage Bolt M12*140 (Coach Bolt) Heavy Duty Galvanized Steel Construction Fastener
Big head carriage bolt M12*140

Big Head Carriage Bolt M12*140 (Coach Bolt) Heavy Duty Galvanized Steel Construction Fastener

big head carriage bolt M12x140
M12x140 carriage bolt with large head
large head carriage bolt M12x140
Big head carriage bolt M12*140
Big head carriage bolt M12x140, also referred to as M12x140 carriage bolt with large head, features a large head carriage bolt M12x140 design for durable fastening and optimal load distribution in heavy-duty applications.
Categories:Fasteners & Fixings
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Product Description

The Big head carriage bolt M12x140 is a heavy-duty fastening component designed for robust structural applications. This M12x140 carriage bolt with large head features a diameter of 12 mm, a length of 140 mm, and an enlarged, square-shaped base beneath the domed head to prevent rotation during installation. Constructed from high-strength steel with a zinc-plated or galvanized finish, it offers corrosion resistance in environments like construction, machinery assembly, and transportation equipment. The large head carriage bolt M12x140 excels in load-bearing scenarios due to its enhanced grip and stability, though its non-insulated design limits use in electrical systems. Ideal for securing metal frames, wood-to-metal joints, and industrial fixtures, it operates within standard temperature ranges (-30°C to 120°C) without performance degradation.
Parameter Specification
Product Model Big head carriage bolt M12x140
Thread Size M12 (12mm diameter)
Length 140mm (under head)
Head Type Large domed head
Head Diameter 24mm ±0.5mm
Square Neck 7mm height
Material Carbon steel Grade 4.8
Tensile Strength 420 MPa
Surface Treatment Zinc plated (5-8μm)
Drive Type Square drive under head
Standard DIN 603
Thread Pitch 1.75mm coarse thread
Torque Value 90-110 N·m
Hex Collar Size 19mm wrench size
question:Do you provide technical selection services?
answer:Yes, our expert team offers tailored technical selection support to ensure optimal product compatibility and performance.
question:Why should we purchase from your company?
answer:As Asia's leading industrial automation trade company with 20 years’ experience, we guarantee quality, reliability, and 85% repeat-client trust.
question:Can your company assist with product technical specifications?
answer:Absolutely, our dedicated specialists provide detailed technical guidance to match your project requirements precisely.
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:Do you provide technical selection services?
answer:Yes, our expert team offers tailored technical selection support to ensure optimal product compatibility and performance.
question:Why should we purchase from your company?
answer:As Asia's leading industrial automation trade company with 20 years’ experience, we guarantee quality, reliability, and 85% repeat-client trust.
question:Can your company assist with product technical specifications?
answer:Absolutely, our dedicated specialists provide detailed technical guidance to match your project requirements precisely.
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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