Simplicity 703447 Carriage Bolt 5/16-18 X 0.625 in

Product Description

The SIMPLICITY 703447 is a carriage bolt used in lawn and garden equipment assembly and repair. This fastener features a 5/16-18 thread specification, indicating a 5/16-inch nominal diameter with 18 threads per inch (UNC coarse thread). The grip length measures 0.625 inches. Carriage bolts are distinguished by their rounded dome head and square shoulder beneath, which locks the bolt in place as the nut is tightened, eliminating the need to hold the bolt head during installation. Service technicians and equipment repair professionals use this part as a direct OEM replacement in Simplicity lawn and garden applications.

This carriage bolt is suited for structural and mechanical fastening tasks found in residential lawn and garden equipment. It is commonly encountered during deck, chassis, or housing assembly on Simplicity-branded outdoor power equipment. The 5/16-18 thread size is widely used across mower decks, frames, and accessory mounting points, making this bolt a frequently needed replacement item during routine maintenance and repair work.

Key Features

• 5/16-18 UNC coarse thread for reliable engagement with standard hardware
• 0.625-inch grip length suits shallow fastening applications
• Rounded dome head with square shoulder prevents rotation during torquing
• OEM Simplicity part number ensures correct fitment for specified equipment

Compatibility

Designed as an OEM replacement fastener for Simplicity lawn and garden equipment requiring a 5/16-18 x 0.625-inch carriage bolt.

Installation Notes

Installation is typically performed by equipment technicians or knowledgeable service personnel. Disengage all power, remove the ignition key, and disconnect the spark plug wire before working on outdoor power equipment. Insert the bolt through the pre-drilled hole so the square shoulder seats fully into the material, then thread and tighten the mating nut to the equipment manufacturer's torque specification. Use appropriately sized wrenches or sockets; do not use impact tools at excessive settings on small-diameter fasteners.

Technical Specifications

• Thread Size: 5/16-18 UNC
• Grip Length: 0.625 inches
• Head Style: Carriage (round dome with square shoulder)

Standard Information

• Brand: SIMPLICITY
• Manufacturer Part Number: 703447