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Disc-Lock's Heavy Hex Zinc Plated Lock Nut with washer is a reliable choice for high-stress fastening applications that require maximum clamp load maintenance. This lock nut gets tighter under shock and vibration, making it perfect for safety-critical areas. Its unique interlocking cams make it easier to install and remove with standard equipment while maintaining reusability. Made from grade 5 (Class 8.8), grade 8 (Class 10.9), and stronger bolts compatible materials, this lock nut delivers exceptional strength and durability for various industries such as automotive, aerospace, marine, construction, and more.