The Tuthill Fill-Rite FS3901 is a 3/8-16 nylock nut featuring a cadmium plating for enhanced corrosion resistance. This durable nut is designed for use in various mechanical applications, providing a secure fastening solution. The nylock feature ensures that the nut remains securely in place, preventing loosening due to vibration or movement. Ideal for use in automotive, industrial, and construction applications, this nut is essential for maintaining the integrity of your assemblies and ensuring reliable performance.