Secure wood-to-metal and metal-to-metal assemblies with smooth, low-profile safety fastening. Built for smooth-surface applications where protruding bolt heads pose a snag hazard or safety risk, this 1/2in-20 x 1-1/2in Grade 2 carriage bolt features a rounded domed head and a precision square neck. The square neck bites firmly into pre-punched square metal holes or wood timber, locking the bolt in place so you can tighten the nut from one side without requiring a second wrench.
Key Features
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1/2in-20 SAE Fine Thread: Features fine 20 threads-per-inch pitch for higher clamping force, precise tensioning, and superior resistance to loosening from vibration.
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1-1/2in Overall Length: Ideal length for securing medium-thickness structural brackets, trailer decking, gate hinges, and machinery frames.
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Square Neck Anti-Rotation: Square shank directly under the smooth head seats into square holes to prevent the bolt from spinning during installation or removal.
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Corrosion-Resistant Zinc Plating: Electro-zinc finish provides reliable protection against rust, moisture, and mild outdoor exposure.
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Grade 2 Carbon Steel: Standard commercial-grade steel construction offering dependable tensile strength for light-to-medium duty structural applications.
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Smooth Round Head Profile: Dome head design leaves no sharp edges exposed, preventing snagging on cargo, clothing, or equipment.
Product Specifications
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Product Type: Carriage Bolt / Round Head Square Neck Bolt
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Thread Size: 1/2in-20 Fine Thread (UNF)
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Length: 1-1/2in (Measured from under the head to tip)
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Material Grade: SAE Grade 2 Low/Medium Carbon Steel
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Finish: Zinc-Plated
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Head Style: Round Smooth Dome
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Neck Style: Square Anti-Spin Neck
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Recommended Applications: Trailer Decking, Structural Framing, Farm Equipment, Fence Gates, Commercial Machinery, and Wood-to-Metal Connections
