M12x60 Big Head Carriage Bolt (Coach Bolt) - Heavy-Duty Zinc-Plated Steel, DIN 603 Standard

Big head carriage bolt M12x60

M12x60 coach bolt

Heavy duty carriage bolt 60mm

Big head carriage bolt M12*60

Big head carriage bolt M12x60, also known as M12x60 coach bolt, designed for heavy-duty applications. 60mm length ensures durable fastening in construction, machinery, and furniture assembly. Corrosion-resistant finish.

Specification

SEODescription

The Big head carriage bolt M12x60, also known as M12x60 coach bolt or Heavy duty carriage bolt 60mm, is a robust fastening solution designed for high-stress applications. Featuring a domed, enlarged head with a square neck to prevent rotation during installation, this bolt has an M12 metric thread diameter and 60mm shank length. Constructed from grade 8.8 carbon steel with hot-dip galvanized coating, it offers a tensile strength of 800 MPa and withstands torque values up to 115 Nm. Compatible with structural frameworks requiring secure module connections, it operates effectively in temperatures ranging from -30°C to 120°C and suits industries like construction, rail infrastructure, and heavy machinery assembly. While its durable design ensures vibration resistance and corrosion protection, the bolt's substantial weight may limit use in weight-sensitive applications. The partial threading below the square neck enables firm anchoring in wood or metal substrates, making it ideal for permanent installations demanding shear strength and load distribution.

SEOSpecification

Parameter	Specification
Product Model	Big head carriage bolt M12x60
Alternative Designation	M12x60 coach bolt, Heavy duty carriage bolt 60mm
Shank Diameter	12mm (M12)
Total Length	60mm ±1.5mm
Head Type	Oval head with square neck
Material Grade	Carbon steel ASTM A307
Surface Finish	Hot-dip galvanized (50μm)
Thread Specification	ISO Metric coarse thread (1.75mm pitch)
Square Neck Dimensions	9.7mm x 9.7mm
Head Diameter	24mm ±0.5mm
Tensile Strength	420 MPa minimum
Torque Capacity	110 N·m (dry)
Temperature Range	-20°C to +120°C

SEOQandA

question:How do you handle refurbished products with malfunctions?
answer:We offer repair or replacement for refurbished items with malfunctions under our warranty terms.
question:Do you accept payment after delivery?
answer:We require payment before shipment for standard orders. Custom terms may apply for trusted partners.
question:What does the warranty cover?
answer:The warranty covers defects in materials or workmanship for a specified period from purchase date.

SEOQandA_Product

question:Difficulty installing bolt head into slot
answer:Ensure slot dimensions match bolt head; verify head size meets standard specifications.
question:Bolt loosening under vibration
answer:Use lock washers or thread-locking adhesive; apply proper torque during installation.
question:Corrosion in outdoor environments
answer:Opt for stainless steel material or apply protective coatings like zinc plating.
question:Incorrect bolt length or diameter
answer:Confirm M12*60 specifications match application requirements; measure before installation.
question:Bolt head stripping during tightening
answer:Use properly sized tools; avoid over-torquing to prevent damage to the head.