Value Collection R50000031 Hex Lock Nut 1/2-20

Product Description

The VALUE COLLECTION R50000031 is a 1/2-20 UNF hex lock nut with a nylon insert locking mechanism, manufactured from Grade 2 steel with a zinc-plated finish. The nylon insert deforms around the mating thread when driven down, creating a prevailing torque that resists loosening from vibration and rotation without requiring a separate lock washer or adhesive. At 0.0215 pounds per unit, this is a standard-duty fastener suited for general-purpose mechanical assemblies across HVAC, plumbing, electrical, and light structural applications. Installation requires only a standard wrench sized to the 3/4-inch across-flats dimension.

This lock nut is used wherever a 1/2-20 UNF fine-thread fastening point requires vibration resistance in a non-reusable or limited-reuse context. Typical applications include equipment mounting brackets, fan assemblies, pump hardware, and panel components in residential and light commercial trade work. The zinc-plated finish provides moderate corrosion resistance suitable for indoor and protected outdoor installations. This SKU is sold as a single unit with a minimum order quantity of 100 pieces.

Key Features

• Nylon insert locking style resists loosening under vibration without additional hardware
• 1/2-20 UNF right-hand thread for compatibility with standard fine-thread fastener systems
• Grade 2 steel construction provides adequate tensile strength for general mechanical use
• Zinc-plated finish offers moderate corrosion protection for indoor and sheltered installations
• 3/4-inch across-flats width accepts standard hex wrenches and sockets
• 21/64-inch height in a compact profile suitable for space-constrained mounting points

Compatibility

Designed as a standard 1/2-20 UNF hex lock nut replacement or new-install fastener for general mechanical assemblies requiring a nylon insert prevailing-torque locking style.

Installation Notes

Installation is performed by any trade requiring secure fastening at 1/2-20 UNF threaded connections. Power down or de-energize any equipment before accessing fastener points on live assemblies. Use a properly sized 3/4-inch hex wrench or socket to drive the nut; avoid over-driving, which can damage the nylon insert and reduce locking effectiveness. Nylon insert lock nuts are generally not recommended for reuse once fully removed, as the insert loses prevailing torque after initial installation.