100 Pack Knurled Bolt & Nut KitDURABLE CONSTRUCTION: Made of heat-treated steel with a zinc trivalent coating for corrosion resistance, these Grade 5 carriage bolts are built to last.SECURE FITTING: With a 1/4-20×2 Inch thread size, these bolts provide a tight connection for any wood or composite material project.STOPS SPINNING: The ribbed knurled neck ensures the bolt stays in place while tightening in the mounting hole to simplify installation and prevent loosening over time.VERSATILE USE: Suitable for mounting and assembling fences, doors, decks, wood hinges and more, these bolts solve fastening needs for many outdoor and indoor projects.CORROSION RESISTANCE: The zinc trivalent coating protects the steel bolt both underground and above ground to guard against rust and corrosion so it maintains strength over the long haul.