Value Collection 1-KN-37C K-lock Hex Nut 3/8-16 Ss

Product Description

The VALUE COLLECTION 1-KN-37C is a K-Lock hex nut with an integrated external tooth lock washer, manufactured from grade 18-8 stainless steel. This one-piece fastener combines a standard UNC-threaded hex nut with a serrated lock washer that bites into the mating surface under torque, resisting loosening from vibration and dynamic loads. The 3/8-16 thread size and 0.5625-inch width across flats make it compatible with standard hex wrenches and sockets. At 0.391 inches overall height, the nut maintains a low profile while delivering reliable locking performance. Installers in HVAC, plumbing, electrical, and general mechanical trades use this type of fastener where joint integrity under vibration is required.

This K-Lock nut is suited for residential and light commercial mechanical assemblies where a UNC 3/8-16 thread pattern is specified. Typical applications include equipment mounting, panel fastening, pipe bracket attachment, and structural connections exposed to vibration or intermittent loads. The uncoated 18-8 stainless steel construction provides corrosion resistance in wet or humid environments, making it appropriate for outdoor equipment installations, pool equipment enclosures, and rooftop HVAC units. Minimum order quantity is 25 pieces per order.

Key Features

• Integrated external tooth lock washer eliminates the need for a separate lock washer component
• Grade 18-8 stainless steel construction for corrosion resistance in humid and outdoor environments
• 3/8-16 UNC thread pattern for broad compatibility with standard fastener hardware
• 0.391-inch overall height provides a low-profile seating footprint
• Uncoated finish suitable where galvanic interaction with coated fasteners must be avoided
• Serrated external teeth bite into mating surface to resist vibration-induced loosening

Compatibility

Designed as a standard UNC 3/8-16 K-Lock hex nut replacement or new installation fastener for any application requiring an external tooth lock washer nut in grade 18-8 stainless steel.

Installation Notes

Installation is performed with a standard 9/16-inch hex wrench or socket. Ensure the mating surface is clean and free of debris so the external teeth can seat properly and provide full locking engagement. Do not reuse K-Lock nuts after removal, as the serrated teeth deform upon initial torquing and will not lock reliably if reinstalled. Follow applicable mechanical and structural codes for fastener torque specifications based on joint design and load requirements.