Value Collection R50000273 Carriage Bolt 3/4-10 4 in Grade 5

Product Description

The VALUE COLLECTION R50000273 is a 3/4-10 carriage bolt with a 4-inch length under head, manufactured from Grade 5 steel with a zinc-plated finish. The square neck design seats flush into wood or structural material, preventing rotation during installation without requiring a wrench on the bolt head. This fastener follows Unified National Coarse (UNC) thread standards and is suited for high-load structural connections in construction, equipment assembly, and infrastructure work. The zinc plating provides corrosion resistance for general indoor and light outdoor applications. Licensed tradespeople and construction professionals install this bolt wherever a smooth, rounded head profile and strong clamping force are required.

This carriage bolt is used in wood-to-wood and wood-to-metal structural connections, including framing, dock construction, playground equipment, and mechanical equipment mounting. The 3/4-10 UNC thread is a heavy-duty size commonly specified in structural and agricultural applications. Grade 5 marking indicates medium-strength steel suitable for demanding mechanical and construction fastening where higher proof load is needed compared to Grade 2 fasteners.

Key Features

• 3/4-10 UNC thread for heavy-duty structural fastening
• 4-inch length under head accommodates standard structural lumber and steel stack-ups
• Grade 5 steel provides higher proof load and tensile strength than Grade 2
• Square neck prevents bolt rotation during nut tightening without a secondary wrench
• Zinc-plated finish offers corrosion resistance for general and light outdoor use
• Rounded dome head delivers a smooth, low-profile exterior surface

Compatibility

Designed as a standard 3/4-10 UNC carriage bolt for use with 3/4-10 hex nuts and flat or lock washers in wood framing, structural steel, and general mechanical assembly applications.

Installation Notes

Installation is typically performed by carpenters, ironworkers, or general contractors using standard hand or impact tools. Pre-drill a hole sized to the bolt shank diameter so the square neck pulls flush and locks cleanly into the material. Apply torque to the nut side only — do not drive the dome head. Follow applicable structural codes such as the IBC or AISC specifications for fastener torque and connection requirements.