1/4-20 Serrated Flange Hex Nuts – Grade 8 Strength – Alloy Steel – High-Torque Automotive Industrial Fasteners Qty 60

These 1/4-20 Hex Serrated Flange Lock Nuts are engineered for vibration-prone assemblies where ordinary nuts loosen over time. The serrated flange creates a mechanical locking action that grips the mating surface, helping prevent movement, rattling, and repeated maintenance. Built to SAE J995 Grade 8 strength standards, these nuts deliver the durability and holding power needed for garage door tracks, opener brackets, gate hardware, and metal framing that see constant motion and stress. Fits 1/4" carriage bolts. Hex Drive Size: 7/16" Finished with a zinc clear trivalent coating for corrosion resistance, they provide a washer-free, professional-grade locking solution that installs quickly and stays tight longer. Why these lock nuts stand out Serrated flange design for vibration resistance Grade 8 performance for demanding hardware applications Anti-rattle hold that helps quiet loose assemblies No separate lock washers required Corrosion-resistant zinc clear trivalent finish Whether you’re fixing a rattling garage door track or upgrading hardware that won’t stay tight, these heavy-duty serrated flange lock nuts delivers the secure, long-lasting hold your project needs.

• BUILT-IN LOCKING ACTION: Each nut features integrated serrations that bite into the mating surface to resist loosening from vibration and movement—helping stop rattles and repeat tightening. Fits 1/4" carriage bolts. Hex Drive Size: 7/16".
• SAE J995 GRADE 8 STRENGTH: Manufactured to SAE J995 Grade 8 standards for high tensile strength and durability in demanding, vibration-prone applications.
• ANTI-RATTLE HARDWARE UPGRADE: Perfect for replacing standard nuts that back off over time—ideal for garage door tracks, opener brackets, gates, and metal assemblies that are prone to noise and vibration.
• NO EXTRA WASHERS NEEDED: The serrated flange design acts like a built-in lock washer, saving time and parts while ensuring a secure, professional-grade installation.
• CLEAR ZINC-PLATED FOR LONG-TERM DURABILITY: Protective clear zinc finish resists rust and corrosion in garages, workshops, and outdoor environments.