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Upgrade your fastener kit with Hex Lock Nuts Serrated Flange Case Harden Steel Black Oxide 1/4-20. These high-strength lock nuts combine a heavy-duty hex shape with a serrated flange and a case-hardened steel core for lasting durability in vibratory or high-load applications. The black oxide finish adds corrosion resistance and a low-gloss appearance, ideal for equipment, automotive, and industrial assemblies.
Designed for reliability, the serrated flange bites into the mating surface to help resist loosening under shock and vibration, while the lock-nut design provides added security. This combination reduces the need for retightening and helps maintain consistent torque in demanding environments.
Whether you’re repairing equipment, building a rugged machine, or stocking a parts cabinet, these Hex Lock Nuts deliver dependable performance where a secure, vibration-resistant connection is required. Order now to ensure you have the right 1/4-20 hex lock nuts with serrated flanges for your next project.