Value Collection HNI5125LH-010BX Hex Nut 1-1/4-7 Unc

Product Description

The VALUE COLLECTION HNI5125LH-010BX is a left-hand thread hex nut sized 1-1/4-7 UNC, manufactured from Grade 2 steel with a bright uncoated finish. Left-hand thread fasteners tighten counterclockwise and are specified in applications where standard right-hand threads would loosen under rotational forces, such as certain rotating shafts, pedal axles, and mechanical assemblies. The nut measures 1.875 inches across the flats and 1-1/16 inches in height. It carries no special military specification rating and is suited for general-purpose mechanical fastening where a non-coated, moderate-strength steel nut is required. Licensed tradespeople and maintenance technicians working with industrial or mechanical equipment are the typical installers.

This hex nut is used in residential, commercial, and industrial mechanical assemblies where left-hand thread engagement is required to prevent self-loosening during counterclockwise rotation. Common applications include conveyor systems, rotating shaft assemblies, and specialty equipment that relies on reverse-thread fasteners to maintain joint integrity. The 1-1/4-7 UNC thread designation indicates a coarse thread form with 7 threads per inch, standard in North American mechanical fabrication and repair work.

Key Features

• Left-hand thread direction prevents loosening in counterclockwise-rotating applications
• 1-1/4-7 UNC coarse thread form for reliable engagement in standard North American fastener bores
• Grade 2 steel construction provides general-purpose strength for non-critical structural fastening
• Bright uncoated finish — no plating or coating that could affect dimensional tolerances
• 1.875 inches across flats fits standard open-end, box-end, and socket wrenches in that size range

Compatibility

Designed as a general-purpose left-hand thread hex nut for use with 1-1/4-7 UNC left-hand threaded bolts, studs, or rods in mechanical assemblies requiring reverse-thread fastening.

Installation Notes

Installation and removal require a wrench sized for 1.875-inch flats; note that left-hand thread fasteners tighten counterclockwise and loosen clockwise, opposite of standard fasteners. De-energize and lock out any equipment before servicing fasteners in rotating or powered assemblies. Torque to the value specified by the equipment manufacturer or applicable engineering standard for Grade 2 steel fasteners of this diameter. Do not substitute a right-hand thread nut in a left-hand thread application.