NL Industries, Inc., through its subsidiary, CompX International Inc., operates in the component products industry in the United States and internationally.

The company manufactures and sells mechanical and electronic cabinet locks and other locking mechanisms, including disc tumbler locks; pin tumbler locking mechanisms under KeSet, System 64, TuBar, and Turbine brands; and electronic locks under CompX eLock and StealthLock brands for use in various applications, such as mailboxes, ignition systems, file cabinets, desk drawers, tool storage cabinets, high security medical cabinetry, integrated inventory and access control secured narcotics boxes, electronic circuit panels, storage compartments, gas station security, vending and cash containment machines.

It also offers original equipment and aftermarket stainless steel exhaust headers, exhaust pipes, mufflers, and other exhaust components; gauges, such as GPS speedometers and tachometers; mechanical and electronic controls and throttles; wake enhancement devices, trim tabs, steering wheels, and other billet aluminum accessories; dash panels, LED indicators, wire harnesses, and other accessories; and grab handles, pin cleats, and other accessories; primarily for performance and ski/wakeboard and performance boats.

The company sells its component products directly to original equipment manufacturers, as well as through distributors.

NL Industries, Inc. was founded in 1891 and is based in Dallas, Texas. NL Industries, Inc. is a subsidiary of Valhi, Inc.