Nut Lock 3/8-16

The Nut Lock 3/8-16 from JERICO is a hex-head nylon-insert locking fastener engineered for applications requiring vibration resistance and thread security. This fastener type is essential in high-vibration environments—from automotive assemblies to machinery and equipment—where traditional nuts risk self-loosening under dynamic stress. The 3/8-inch diameter with 16 threads per inch (TPI) makes it compatible with standard 3/8-16 threaded rods, bolts, and studs across industrial, mechanical, and general construction sectors.

Constructed from steel with a zinc oxide finish, the Nut Lock 3/8-16 delivers corrosion resistance and durability in both indoor and moderately corrosive environments. The nylon insert—a self-locking mechanism—creates friction against the bolt thread as the nut is tightened, preventing loosening without requiring adhesive or secondary locking devices. This design maintains clamp load consistency over repeated vibration cycles, eliminating the need for lock washers or thread-locking compounds in most applications. The hex-head configuration allows straightforward installation and removal with standard wrenches or sockets.

Professionals and equipment manufacturers benefit most from this fastener in assembly lines, engine blocks, structural frameworks, and any machinery subject to continuous or cyclic loading. Installation is simple: thread onto a 3/8-16 bolt and tighten to snug; the nylon insert engages progressively, requiring slightly more torque than standard nuts but delivering superior vibration-proof performance. Each unit is sold individually, making it ideal for repair kits, replacement stock, or small-batch assembly work. Verify bolt diameter and thread pitch before purchase to ensure compatibility with your application.