M6*12 Big Head Carriage Bolt - Coach Bolt, Zinc Plated, Furniture & Construction Fastener

Big head carriage bolt M6x12

M6x12 large head carriage bolt

Coach bolt M6x12 big head

Big head carriage bolt M6*12

Big head carriage bolt M6x12, also known as M6x12 large head carriage bolt or Coach bolt M6x12 big head, features an expanded domed head for increased load distribution. Made of zinc-plated steel for corrosion resistance, ideal for wood-to-metal fastening in construction, furniture, and DIY projects. Requires pre-drilled hole and hex nut installation. Complies with metric threading standards.

Specification

SEODescription

The Big head carriage bolt M6x12 is a heavy-duty fastening component designed for robust structural applications, featuring a smooth, domed head and square neck to prevent rotation during installation. With an M6x12 thread size and large head diameter, this Coach bolt M6x12 big head offers high tensile strength (typically 8.8 grade) and corrosion resistance through zinc-plated or stainless steel variants. It directly interfaces with pre-drilled modules requiring 6mm bore diameters, supporting vertical load capacities up to 4.5kN. Compatible with standard hex wrenches and impact drivers, it operates effectively in environments ranging from -30°C to +120°C, making it ideal for construction, rail infrastructure, and industrial machinery assembly. The M6x12 large head carriage bolt excels in vibration resistance but requires precise alignment due to its non-recessed square shoulder. Its oversized head enhances surface contact for improved load distribution, though this may limit use in space-constrained applications.

SEOSpecification

Parameter	Specification
Product Model	Big head carriage bolt M6x12, M6x12 large head carriage bolt, Coach bolt M6x12 big head
Thread Size	M6 (6mm diameter)
Length	12mm
Head Type	Large domed head with square neck
Head Diameter	11.5mm ±0.3mm
Head Height	5mm ±0.2mm
Material	Carbon steel (Grade 4.8) / Stainless steel (A2-70)
Surface Finish	Zinc-plated or plain
Thread Pitch	1.0mm
Square Neck Width	4.5mm ±0.1mm
Standard	DIN 603 / ISO 1207
Torque Resistance	8-10 Nm (zinc-plated), 6-8 Nm (stainless steel)

SEOQandA

question:How do you handle shipping?
answer:We support DHL, Fedex, UPS, and other major shipping methods for reliable global delivery.
question:Why should I choose your company?
answer:As Asia's leading industrial automation trader with 20+ years, we ensure quality, reliability, and 85% repeat customers.
question:Can I arrange self-pickup with official couriers?
answer:Yes, provide your tracking number or request pickup assistance, and we'll coordinate with the courier directly.

SEOQandA_Product

question:Bolt loosening under vibration?
answer:Use lock washers or thread-locking adhesive to secure.
question:Difficulty in installation due to head shape?
answer:Use a wrench or socket designed for square neck carriage bolts.
question:Corrosion in outdoor environments?
answer:Opt for stainless steel or galvanized material bolts.
question:Mismatched length causing poor grip?
answer:Confirm required grip length and select correct bolt size.
question:Shear strength insufficient for load?
answer:Upgrade to higher-grade bolts (e.g., Grade 5/8).