M12*35 Big Head Carriage Bolt - Large Head Coach Bolt, HeavyDuty Series, Galvanized Steel Fastener

Big head carriage bolt M12

Carriage bolt with large head

M12x35 coach bolt

Big head carriage bolt M12*35

Big head carriage bolt M12, a heavy-duty Carriage bolt with large head, designed for secure fastening in wood and metal applications. M12x35 coach bolt features a smooth domed top and square neck to prevent rotation during installation. Ideal for construction, furniture, and outdoor projects. Zinc-plated steel for corrosion resistance.

Specification

SEODescription

The Big head carriage bolt M12x35, also known as a Carriage bolt with large head or M12x35 coach bolt, features a distinctive domed head with square neck measuring 24mm diameter for secure anti-rotation installation. This 12mm diameter, 35mm length fastener complies with DIN 603/ISO 8677 standards, typically manufactured in grade 4.8 carbon steel or A2/A4 stainless steel variants. With 700-800 MPa tensile strength, it supports structural applications in construction, machinery, and agricultural equipment. The zinc-plated or hot-dip galvanized surface treatment ensures corrosion resistance (-30°C to 120°C operational range). Its primary advantage lies in the integrated square neck that prevents bolt rotation during nut tightening, though requires precise 12.5mm pre-drilled holes. Typical torque values range 40-60 N·m depending on material.

SEOSpecification

Parameter	Specification
Bolt Type	Big Head Carriage Bolt
Model Designation	M12x35 Coach Bolt
Material Grade	Carbon Steel (Grade 8.8)
Surface Treatment	Zinc Plated (5-8μm)
Shank Diameter	12mm (M12)
Total Length	35mm (Under Head)
Head Diameter	24mm (DIN 603 Standard)
Head Height	8mm
Thread Length	24mm (Minimum)
Tensile Strength	800 MPa
Torque Value	85-90 Nm (Dry)
Standard Compliance	DIN 603 / ISO 10510
Application	Structural wood connections, metal framing

SEOQandA

question:Can I schedule a self-pickup with the official courier?
answer:Yes, you can arrange self-pickup. Contact our support team for assistance.
question:What happens if a refurbished product malfunctions?
answer:We offer a replacement or refund immediately upon confirming refurbished status.
question:Does the company have a professional product selection team?
answer:Yes, our expert team selects products based on market trends and quality standards.

SEOQandA_Product

question:Bolt loosening during use.
answer:Apply thread-locking adhesive or use a lock washer.
question:Difficulty in installation due to incorrect hole size.
answer:Ensure pre-drilled hole diameter matches bolt specifications (13mm for M12).
question:Corrosion in harsh environments.
answer:Select stainless steel or galvanized material bolts.
question:Head shape incompatible with tool.
answer:Verify head type (hex, square) matches available wrench/socket.
question:Thread damage during tightening.
answer:Use proper torque settings and avoid over-tightening.