Lawson 53987 Grade 8 Nylon Insert Lock Nut 7/8″-9 USS Perma Plate Pack of 5 The Lawson 53987 Grade 8 Nylon Insert Lock Nut is engineered to provide superior fastening performance in demanding applications. Designed with a 7/8″-9 USS thread, this lock nut ensures a secure and reliable connection, making it ideal for automotive, mechanical, and construction projects. Key Features High-Strength Construction: Manufactured from Grade 8 alloy steel, this lock nut offers exceptional tensile strength, ensuring durability and resistance to heavy loads. Nylon Insert Mechanism: The integrated nylon insert creates rotational resistance when engaged with a mating male threaded fastener, effectively preventing loosening due to vibration or movement. Perma Plate Finish: The Perma Plate coating provides enhanced corrosion resistance, protecting the nut from rust and wear, thereby extending its service life. Standard Compliance: Meets SAE J995C specifications, ensuring compatibility and reliability in various industrial applications. Technical Specifications Thread Size: 7/8″-9 USS (Unified National Coarse) Material: Grade 8 Alloy Steel Finish: Perma Plate (Yellow Zinc Chromate) Package Quantity: 5 pieces These lock nuts are suitable for use in environments where vibration or movement could cause standard fasteners to loosen. The nylon insert not only prevents damage to bolt threads but also allows for multiple reuses without compromising performance. Ensure optimal fastening security in your projects with the Lawson 53987 Grade 8 Nylon Insert Lock Nut.