John Deere K40003 3/8" Hexagonal Lock Nut, 5-Pack is designed to securely fasten components and prevent loosening caused by vibration. This lock nut features a width across flats of 14.27 mm (9/16 in) and a thread size of 9.52 mm (3/8 in), making it suitable for a variety of applications. It includes a locking type D mechanism and has a thickness of 8.89 mm (0.35 in) to provide enhanced stability and reliability. Crafted from high-quality general steel and finished with a zinc coating, this lock nut superior corrosion resistance to ensure long-lasting performance. Model Number: K40003