1/4" x 3/4" Zinc Plated Flat Head Carriage Bolts & Lock Nuts with Knurled Neck, 25 Sets, Track Hardware Replacement for Garage Doors, Curved Rails & Extension Ladders

Precision Fit & Anti-Spin Design: Engineered with a unique knurled neck that securely grips the hardware hole, preventing the bolt from spinning during installation. This flat head design ensures a flush, snag-free finish on your garage door tracks or ladder rungs. | Universal Garage & Ladder Compatibility: The perfect 1/4-20 x 3/4" replacement kit for vertical and curved garage door tracks. Also widely used for repairing extension ladder hinges and rails. A versatile hardware essential for both homeowners and professional garage door technicians. | Corrosion-Resistant Zinc Finish: Manufactured from high-strength steel with a premium zinc plating. Designed to resist rust and corrosion in humid garage environments, ensuring long-lasting structural integrity and safety for your overhead door systems. | Secure Self-Locking System: Each set includes a matching lock nut designed to stay tight under constant vibration and tension. Replace your worn-out, loose hardware with this professional-grade kit to restore smooth, quiet operation to your door tracks. | Bulk 25-Set Project Value: Comes in a convenient 25-piece bulk pack, providing enough hardware for a full track overhaul or multiple ladder repairs. A must-have for your home maintenance kit to handle emergency repairs quickly and efficiently.