Value Collection 1-THN-50F Hex Lock Nut 1/2-20 18-8 Ss

Product Description

The VALUE COLLECTION 1-THN-50F is a 1/2-20 UNF hex lock nut with a nylon insert locking mechanism, manufactured from 18-8 stainless steel with a bright uncoated finish. The nylon insert compresses against the mating thread when driven down, creating resistance that prevents loosening under vibration and dynamic load. At 5/16 inches high with a 3/4-inch width across flats, this nut fits standard 1/2-20 fastener applications. It is right-hand threaded and carries no military specification designation. Plumbers, pipefitters, HVAC techs, and electricians use this style of prevailing-torque fastener wherever stainless corrosion resistance and reliable thread retention are both required.

This nut is suited for general mechanical and trade assembly applications that call for a UNF 1/2-20 thread and corrosion-resistant hardware. Typical install scenarios include mounting brackets, equipment panels, piping supports, and structural connections in environments exposed to moisture or mild chemicals where carbon steel hardware would corrode. The 18-8 stainless steel grade makes it a common choice in HVAC equipment rooms, pool mechanical areas, plumbing chases, and marine-adjacent installations. Sold individually; minimum order quantity is 10 units per order.

Key Features

• Nylon insert locking style provides prevailing torque that resists vibration-induced loosening without a secondary locking device
• 18-8 stainless steel construction resists corrosion in wet and chemically active environments
• 1/2-20 UNF right-hand thread for compatibility with standard unified fine-pitch fasteners
• Bright uncoated finish — no plating to crack, flake, or react with stainless mating hardware
• 5/16-inch height keeps the installed stack height compact in tight clearance assemblies
• Width across flats of 3/4 inch accepts standard 3/4-inch hex wrenches and sockets

Compatibility

Designed for use with 1/2-20 UNF right-hand threaded fasteners in standard inch-measurement applications. No specific brand or model compatibility is stated by the manufacturer for this fastener.

Installation Notes

Install with a calibrated torque wrench and a 3/4-inch hex socket or open-end wrench. Avoid using an impact driver, as excessive torque can shear the nylon insert and eliminate the locking function. De-energize and depressurize any equipment before servicing fastened assemblies. Consult applicable mechanical and structural codes for torque requirements specific to the joint being assembled.