Keystone Threaded Products UM020AG1F003045 Hex Nut

Product Description

The KEYSTONE THREADED PRODUCTS UM020AG1F003045 is a steel hex nut with a 1-1/4-5 Acme left-hand thread profile and a 2G thread fit class. It measures 2 inches across the flats and 1-7/32 inches in height, weighing 0.88 pounds. Left-hand Acme threads are used where rotation in service would cause a standard right-hand nut to loosen, such as in lead screws, linear actuators, jack screws, and certain industrial machinery applications. This nut is installed by licensed mechanics, millwrights, and maintenance technicians working on mechanical drive or motion systems.

This hex nut is suited for industrial and mechanical assembly applications that require left-hand Acme threading. Typical use cases include linear motion hardware, machine tool drives, and industrial jack assemblies where the thread direction prevents self-loosening under operational torque loads. The 2G fit class indicates a standard commercial tolerance, appropriate for general-purpose industrial service. This part does not meet military specifications.

Key Features

• Left-hand Acme thread prevents loosening in applications with reverse-rotation loads
• 1-1/4-5 thread size with 2G fit class for standard commercial tolerance
• 2 inches across flats for use with standard hex tooling
• 1-7/32 inches height provides full thread engagement depth
• Steel construction for strength in mechanical drive applications
• UNSPSC Code 31161727 for procurement and catalog classification

Compatibility

Designed for use in mechanical assemblies requiring a 1-1/4-5 left-hand Acme thread with a 2G fit class tolerance. Consult thread engagement requirements for the mating lead screw or shaft before installation.

Installation Notes

Installation should be performed by a qualified mechanic or millwright familiar with Acme thread fastener systems. Ensure the mating thread is also left-hand before assembly, as mixing thread directions will damage threads. De-energize and lock out any machinery before servicing linear motion or drive components. Standard hex tooling sized for a 2-inch across-flats fastener is required.