Value Collection NLI2125NTU-005B Hex Lock Nut 1-1/4-7

Product Description

The VALUE COLLECTION NLI2125NTU-005B is a 1-1/4-7 UNC hex lock nut with a nylon insert locking mechanism, manufactured from Grade 2 steel with a bright, uncoated finish. The nylon insert deforms around mating threads under torque, creating resistance to loosening caused by vibration and dynamic loading. The nut measures 1-7/64 inches in height and 2 inches across the flats. It conforms to ASME B 18.16.6, the standard governing prevailing-torque hex nuts with nonmetallic inserts. Installation and removal require a standard 2-inch wrench. This fastener is used by mechanical contractors, millwrights, plumbers, and general industrial assemblers wherever vibration-resistant fastening is required.

The NLI2125NTU-005B is suited for general-purpose structural and mechanical assemblies where UNC thread engagement and vibration resistance are required. Typical applications include equipment mounting, pipe hanger hardware, structural steel connections, and industrial machinery assembly. The right-hand thread direction is compatible with standard UNC threaded rod and bolts in the 1-1/4-7 pitch. This nut is intended for service environments where a metallic locking feature is not specified and a nylon insert is acceptable per the design requirement.

Key Features

• Nylon insert locking style provides vibration-resistant prevailing torque per ASME B 18.16.6
• 1-1/4-7 UNC thread size with right-hand thread direction
• Grade 2 steel construction for general-purpose fastening applications
• Bright, uncoated finish — no added plating or coating
• Height of 1-7/64 inches and 2 inches width across flats
• Does not meet military specifications — commercial-grade fastener

Compatibility

Designed for use with standard 1-1/4-7 UNC threaded fasteners including bolts, studs, and threaded rod conforming to inch-series UNC thread standards.

Installation Notes

Installation should be performed using a properly sized open-end, box-end, or socket wrench sized for 2 inches across the flats. Nylon insert lock nuts are single-use fasteners — the nylon insert loses prevailing torque effectiveness after removal and should not be reused in critical applications. De-energize, depressurize, or otherwise isolate the assembly before servicing any connected fasteners. Consult the applicable mechanical or structural specification for torque requirements, as none are specified for this product.