Keystone Threaded Products UM012AG1F001845 Hex Nut

Product Description

The KEYSTONE THREADED PRODUCTS UM012AG1F001845 is a left-hand thread hex nut machined from Grade 1215 and 12L14 free-machining steel. It is designed for 3/4-5 Acme thread applications, featuring a 2G thread fit class that provides a standard running clearance suited for power transmission and linear motion assemblies. The nut measures 1.25 inches across flats and 47/64 inch in height. Weighing 0.193 pounds, it is a single-piece fastener installed by machinists, millwrights, and maintenance technicians in both light industrial and mechanical assembly settings.

This hex nut is used in applications where left-hand Acme threads are required to prevent loosening under rotational loads or to achieve bidirectional drive mechanics. Typical installations include lead screws, actuators, jack assemblies, and other linear motion components found in industrial equipment and machinery. The 2G thread fit class is a general-purpose Acme classification appropriate for most non-precision power screw applications. It is sold individually and ordered in single-unit quantities.

Key Features

• Left-hand Acme thread direction prevents unintended loosening in reverse-rotation applications
• 3/4-5 Acme thread size with 2G fit class for standard running clearance
• Grade 1215 and 12L14 free-machining steel construction for consistent thread form and machinability
• 1.25 inches across flats fits standard hex tooling
• 47/64 inch height provides adequate thread engagement for Acme load transfer
• Does not meet military specifications - intended for commercial and industrial use

Compatibility

Designed for use with 3/4-5 Acme left-hand threaded lead screws and shafts requiring a 2G thread fit class in commercial and industrial linear motion or power transmission assemblies.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician familiar with Acme thread systems. Verify thread direction before installation - left-hand threads tighten counterclockwise and can be damaged by forcing them onto right-hand shafts. Use appropriate hex wrenches or open-end wrenches sized for a 1.25-inch across-flats dimension. Inspect mating thread surfaces for burrs or damage before assembly to avoid galling on the steel thread form.