Value Collection 305101PR Hex Lock Nut 5-40 Nylon Insert Grade 2

Product Description

The VALUE COLLECTION 305101PR is a nylon insert hex lock nut designed to resist loosening under vibration and dynamic loading. Manufactured from Grade 2 steel with a zinc finish for basic corrosion resistance, this fastener uses an internal nylon collar to create prevailing torque on the mating thread, maintaining clamp load without secondary locking hardware. The thread is #5-40 UNC, right-hand direction, with a 0.125 inch height and 0.25 inch width across flats. It is a standard inch-measurement fastener suited to light-to-medium duty mechanical assemblies across a wide range of trades and fabrication applications.

This hex lock nut is appropriate for use in residential and light commercial mechanical assemblies where vibration resistance is needed without the bulk of flange or prevailing-torque metal-collar nuts. Typical install scenarios include equipment mounting brackets, sheet metal assemblies, HVAC component hardware, electrical enclosure fastening, and general plumbing fixture attachment. The zinc finish offers surface protection in dry or mildly humid interior environments. Installation requires a standard 0.25 inch hex wrench or socket.

Key Features

• Nylon insert locking style provides prevailing torque without additional locking hardware
• Grade 2 steel construction for standard-duty mechanical applications
• Zinc finish provides basic corrosion resistance in interior environments
• #5-40 UNC thread for compatibility with standard inch-series fastener systems
• Right-hand thread direction per UNC fastener standard
• Compact 0.125 inch height suits low-profile and tight-clearance installations

Compatibility

Designed as an OEM-style replacement or standard-stock hex lock nut for any application using #5-40 UNC right-hand threaded fasteners in inch-measurement assemblies.

Installation Notes

Install and remove using hand tools appropriate for a 0.25 inch hex flat, such as a standard open-end wrench or socket driver. Power down or de-energize any associated equipment before servicing fasteners on electrical enclosures or mechanical assemblies. The nylon insert is single-use by design — once fully seated and removed, the locking torque of the insert is reduced and the nut should be replaced. Follow applicable mechanical or electrical codes for fastener torque requirements specific to the assembly being serviced.