Hillman Fasteners 240102 Carriage Bolt 5/16-18 X 3 in 100 Pack

Product Description

The HILLMAN FASTENERS 240102 is a 5/16-18 x 3 inch coarse-thread carriage bolt designed for general structural fastening applications. Constructed from steel with a round dome head and square neck, this bolt is engineered to resist rotation upon tightening without requiring a secondary tool on the head. The square neck seats into wood or pre-drilled substrate material to provide a flush, tamper-resistant bearing surface. Each package contains 100 bolts, making it a practical stock quantity for contractors, maintenance crews, and trade professionals managing recurring fastener inventory.

This carriage bolt is suited for wood-to-wood and wood-to-metal connections in residential and light commercial construction, framing, deck assembly, equipment mounting, and general mechanical fastening. The coarse thread profile provides reliable engagement in wood substrates and standard steel nuts. At 5/16-18 threading and 3 inches in length, this bolt fits a wide range of structural connection points commonly encountered in carpentry, HVAC equipment mounting, electrical panel support framing, and plumbing fixture backing installations.

Key Features

• 5/16-18 coarse thread for reliable engagement in wood and standard steel hardware
• 3 inch length suits moderate-depth through-bolt connections
• Steel construction provides strength suitable for structural fastening
• Round dome head with square neck prevents rotation without a wrench on the head
• 100-bolt pack quantity supports job-site and shop inventory needs

Compatibility

Designed as a standard 5/16-18 coarse-thread carriage bolt compatible with matching hex nuts, washers, and hardware conforming to that thread specification.

Installation Notes

Installation is typically performed by carpenters, general contractors, or trade professionals using a standard wrench or socket on the nut side. The square neck must seat fully into the substrate before torquing the nut to prevent bolt spin. Always use an appropriately sized flat washer and nut rated for the intended load. Follow applicable building codes and structural connection requirements for the specific application.