Value Collection HNFI2037LH-100BX Hex Nut 3/8-24 Left Hand

Product Description

The VALUE COLLECTION HNFI2037LH-100BX is a 3/8-24 UNF left-hand thread hex nut manufactured from Grade 2 steel with a bright, uncoated finish. It measures 0.5625 inches (9/16 inches) across the flats and 21/64 inches in height. Left-hand thread fasteners rotate counterclockwise to tighten, making them the correct choice for applications where standard right-hand threads would loosen under torque or rotational load. This box of 100 nuts is suited for maintenance, repair, and fabrication work across mechanical, HVAC, and light industrial settings.

This nut is used in applications that specifically require left-hand thread fasteners, such as rotating shaft assemblies, pedal spindles, fan blade retainers, and other components subject to counterclockwise rotational forces. Grade 2 steel provides adequate tensile strength for general-purpose fastening in non-critical structural joints. The uncoated finish is appropriate for interior or dry-environment installations where corrosion resistance is not a primary concern. Sold in a box quantity of 100, this package suits shop stock, service vehicle inventory, or project-specific needs.

Key Features

• Left-hand UNF thread (3/8-24) for counterclockwise-tightening applications
• Grade 2 steel construction for general-purpose fastening duty
• Bright, uncoated finish — no plating or coating to add dimensional variance
• 9/16-inch width across flats for standard 9/16-inch wrench or socket
• 21/64-inch height — standard hex nut profile
• Box of 100 for efficient stocking and repetitive-use jobs

Compatibility

Designed for use with any 3/8-24 UNF left-hand thread fastener system requiring a standard hex nut profile. Confirm thread direction before installation, as left-hand thread components are not interchangeable with right-hand thread hardware of the same nominal size.

Installation Notes

Installation is performed by mechanics, millwrights, HVAC technicians, or any trade professional working with left-hand thread assemblies. Always de-energize and lock out equipment before accessing rotating assemblies that use left-hand fasteners. Use a properly sized 9/16-inch wrench or socket and apply torque counterclockwise to tighten. Do not substitute right-hand thread nuts in left-hand thread applications, as thread damage and fastener failure will result.