Value Collection HNFI5125LH-010BX Hex Nut 1-1/4-12 Unf

Product Description

The VALUE COLLECTION HNFI5125LH-010BX is a left-hand thread hex nut machined from Grade 2 steel with a bright, uncoated finish. It is designed for 1-1/4-12 UNF threaded fastener applications where a left-hand thread pattern is required to prevent loosening under counter-clockwise rotation forces. The nut measures 1-7/8 inches across the flats and 1-1/16 inches in height, making it a full-size hex nut suitable for medium-strength bolted connections. Mechanics, millwrights, and maintenance technicians working on rotating equipment, conveyor systems, and specialized machinery rely on left-hand thread fasteners like this one to secure components that experience continuous rotational loads.

This hex nut is used in industrial and mechanical assemblies where standard right-hand thread fasteners would back off due to operational rotation direction. Typical applications include drive shafts, spindles, pedal assemblies, and other rotating or reciprocating components. The Grade 2 steel construction provides adequate tensile strength for general-purpose mechanical connections that do not require a high-strength Grade 5 or Grade 8 specification. The uncoated bright finish is suited for indoor or protected environments where corrosion exposure is minimal.

Key Features

• Left-hand thread direction prevents self-loosening on counter-clockwise rotating assemblies
• 1-1/4-12 UNF thread size for fine-pitch engagement and precise clamping
• Grade 2 steel construction suitable for general-purpose medium-strength applications
• 1-7/8 inches across flats fits standard hex wrenches and sockets
• Bright uncoated finish — no added coating that could alter thread tolerance
• Full hex nut height of 1-1/16 inches for maximum thread engagement depth

Compatibility

Designed for use with 1-1/4-12 UNF left-hand thread bolts and threaded rod in general industrial, mechanical, and maintenance applications requiring a left-hand thread hex nut.

Installation Notes

Left-hand thread fasteners tighten counter-clockwise and loosen clockwise — verify thread direction before installation to avoid cross-threading or damage. Use an appropriate hex wrench or socket sized for 1-7/8 inches across the flats and apply a calibrated torque wrench to reach the proper clamping load for the application. Always inspect mating threaded components for wear or damage before assembly. Follow applicable industry standards and equipment manufacturer specifications for fastener torque and replacement intervals.