DURABLE 1/4-20 STEEL LOCK NUTS: Built with precision 1/4-20 nut threading, these black steel lock nuts ensure strong, secure fastening. Perfect as replacement nuts or for assembling metal components. SERRATED FLANGE NUT FOR SECURE HOLD: Each flange nut features a serrated flange lock design that grips tightly without a washer. These flanged nuts resist loosening from vibration, ideal for demanding screw nut applications. BLACK ZINC FINISH FOR CORROSION RESISTANCE: Finished in sleek black zinc, these black flange lock nuts offer better corrosion resistance than black phosphate. A perfect match with other black hardware. 100-PACK OF FLANGE LOCK NUTS: Includes one hundred serrated flange lock nuts. A great addition to your hardware inventory for home or business. MULTIPURPOSE STEEL NUTS FOR HARDWARE NEEDS: From DIY to industrial repair you will find many uses for these serrated flange nuts. They work as versatile screw nuts or lock nut replacements for home, automotive, or workshop applications. Upgrade your hardware kit with this 100-pack of 1/4-20 nuts from Metal Spacers Online, designed for durability, precision, and long-term performance. Whether you're working on automotive repairs, home improvement, or industrial builds, these metal nuts provide a dependable solution for securing bolts, studs, and threaded components. Each locking nut features a built-in serrated flange lock that grips the mating surface, helping to prevent loosening from vibration or torque making it ideal for high-impact environments. The flanged nut design eliminates the need for a separate washer, saving you time and increasing efficiency during installation. Crafted from high-quality steel, these nuts offer superior strength for demanding applications. The sleek black finish not only adds a professional look but also delivers enhanced corrosion resistance compared to standard black phosphate coatings. Whether you're assembling structural frames, mounting components, or replacing worn parts, this steel nut holds up under pressure. This set includes 100 pieces perfect for projects that require multiple fasteners or to keep on hand as a replacement nut option. The black nut aesthetic blends well with dark or industrial materials, ideal for modern hardware builds or discrete installations. At Metal Spacers Online, we offer a wide range of black finish fasteners to match your exact project needs. Browse our store to find more sizes, materials, and quantities of serrated flange lock nuts and other hardware essentials.