Value Collection KEPI0370-100BX K-lock Hex Nut 3/8-16

Product Description

The VALUE COLLECTION KEPI0370-100BX is a 3/8-16 UNC K-Lock hex nut with an integrated external tooth lock washer, manufactured from steel with a zinc plating finish. This one-piece fastener combines a standard hex nut with a serrated external tooth washer that bites into the mating surface under torque, resisting loosening from vibration and dynamic loads. The zinc plating provides a baseline level of corrosion resistance for general indoor and light outdoor applications. Electricians, plumbers, HVAC technicians, and millwrights commonly use K-Lock nuts wherever a separate lock washer would be impractical or where assembly speed matters. Each nut weighs approximately 0.017 pounds.

K-Lock hex nuts in 3/8-16 UNC thread are widely used in mechanical assemblies, electrical panel work, equipment mounting, and light structural connections. The 3/8-16 thread designation indicates a 3/8-inch nominal diameter with 16 threads per inch, conforming to the Unified National Coarse thread standard. The washer diameter measures 57/64 inches and the width across flats measures 9/16 inches, making these compatible with standard 9/16-inch hex drivers and wrenches. This SKU is sold in a minimum order quantity of 100 pieces.

Key Features

• Integrated external tooth lock washer eliminates the need for a separate lock washer during assembly
• 3/8-16 UNC thread standard for broad compatibility with standard fastener applications
• Zinc plating provides corrosion resistance for general-purpose use
• 9/16-inch width across flats fits standard hex sockets and wrenches
• 57/64-inch washer diameter for adequate bearing surface on typical mating materials
• Sold in quantities of 100 for high-volume assembly and maintenance applications

Compatibility

Designed as a standard replacement or assembly fastener for any application using 3/8-16 UNC threaded hardware where a locking hex nut with an external tooth washer is specified.

Installation Notes

Installation should be performed by a qualified tradesperson following applicable mechanical and electrical codes. Always de-energize and lock out equipment before replacing or installing fasteners in electrical enclosures or live mechanical assemblies. Use a calibrated torque wrench and follow the torque specifications provided by the equipment manufacturer for the specific application. Do not reuse K-Lock nuts that show deformed or flattened lock teeth, as clamping effectiveness will be reduced.