Viking Industries 15043R Carriage Bolt Round Head Square Neck Fastener

The Viking Industries 15043R is a carriage bolt designed for secure wood-to-wood, wood-to-metal, and metal-to-metal fastening applications. Carriage bolts — also known as coach bolts or cup square bolts — feature a smooth, low-profile dome head and an integrated square neck directly beneath it, which bites into the mating material to prevent rotation during installation and tightening.

Key Features:

• Smooth round dome head for a clean, snag-free finished appearance
• Integrated square neck under the head locks into the workpiece to resist rotation without requiring tool access to the head
• Tightened via a standard hex nut — no wrench required on the bolt head
• Suitable for wood-to-wood, wood-to-metal, and metal-to-metal applications
• Commonly used in marine, RV, deck, fence, and structural assembly applications
• Manufactured to meet ASME B18.5 carriage bolt dimensional standards

Viking Industries is a trusted manufacturer of specialty fasteners for the marine, RV, and powersports markets. The 15043R carriage bolt is ideal for structural connections where a finished appearance is required and access to the bolt head is limited or undesirable.