Value Collection 305490PS Hex Lock Nut 1-1/2-12 Nylon Insert

Product Description

The VALUE COLLECTION 305490PS is a hex lock nut with a nylon insert, designed to resist loosening under vibration and dynamic loads. It carries a 1-1/2-12 UNF (Unified National Fine) right-hand thread and is manufactured from Grade 2 steel with a zinc finish for basic corrosion resistance. The nylon insert deforms around the mating threads to create a prevailing-torque locking action without requiring any secondary hardware. Standing 51/64 inches high with a width across flats of 2-3/16 inches, this fastener suits medium-duty structural and mechanical assemblies where thread security is a primary requirement.

This nut is appropriate for general industrial, mechanical, and construction applications that call for a fine-thread locking fastener in the 1-1/2-inch diameter class. Common install scenarios include equipment frames, machinery mounts, and structural connections where vibration or cyclic loading could back off a standard nut. It is handled by millwrights, maintenance mechanics, pipefitters, and general contractors working in both light commercial and industrial settings. The zinc finish provides adequate protection in dry or mildly humid indoor environments.

Key Features

• Nylon insert provides prevailing-torque locking action without secondary lock washers or adhesives
• 1-1/2-12 UNF right-hand thread for fine-pitch engagement and precise clamping
• Grade 2 steel construction suitable for medium-duty load applications
• Zinc finish offers basic corrosion resistance for indoor and sheltered environments
• 2-3/16 inches width across flats fits standard 1-1/2-inch hex tooling

Compatibility

Designed as a standard UNF prevailing-torque hex lock nut compatible with 1-1/2-12 right-hand threaded fastener assemblies meeting inch-measurement standards.

Installation Notes

Installation is performed with a standard open-end or box wrench sized to 2-3/16 inches across flats. The nylon insert is a single-use locking element — once the nut has been removed from the mating bolt, the locking effectiveness of the insert is reduced and replacement is recommended. Ensure mating threads are clean and free of damage before installation. Follow applicable mechanical or structural codes for proper torque ranges based on joint requirements.