Keystone Threaded Products UM004AG1A000580 Hex Nut

Product Description

The KEYSTONE THREADED PRODUCTS UM004AG1A000580 is a 1/4-16 Acme thread hex nut machined from 1215/12L14 leaded steel, a free-machining alloy selected for dimensional consistency and smooth mating surfaces. It carries a 2G thread fit class, indicating a general-purpose commercial tolerance suitable for most power-transmission and linear-motion applications. The nut measures 0.5 inches across the flats and stands 15/64 inches tall, with a right-hand thread direction. At approximately 0.012 pounds, it is a lightweight fastener intended for use wherever a standard Acme thread nut is specified. Licensed tradespeople, machinists, and maintenance technicians commonly source this nut for lead screw assemblies, adjusting mechanisms, and fixture work.

This hex nut is sized for 1/4-16 Acme thread rod or lead screw stock. The Acme thread profile is standard in linear-motion and power-transmission assemblies, including machine tool slides, vises, jigs, and valve stems. The 1215/12L14 steel grade provides adequate strength for light-duty clamping and positioning loads in non-corrosive environments. It does not meet military specifications and is not intended for critical structural or high-cycle fatigue applications. Maintenance techs and industrial mechanics will find it appropriate for replacing worn nuts on existing Acme lead screws without modification.

Key Features

• 1/4-16 Acme thread profile for use with standard Acme lead screw stock
• 2G thread fit class for general-purpose commercial tolerance and reliable mating
• 1215/12L14 free-machining leaded steel for consistent dimensional accuracy
• Right-hand thread direction, the most common orientation in linear-motion assemblies
• 0.5 inches across flats, compatible with standard 1/2-inch wrenching
• Lightweight at 0.012 pounds, suitable for compact mechanism packaging

Compatibility

Designed for use with 1/4-16 Acme threaded rod or lead screw stock in light-duty linear-motion and power-transmission assemblies where a 2G fit class hex nut is specified.

Installation Notes

Installation is performed by machinists or maintenance mechanics familiar with Acme thread assemblies. De-energize and lock out any equipment before replacing a lead screw nut. Hand-start the nut onto the Acme thread to confirm correct engagement before applying a wrench to avoid cross-threading. Inspect the mating lead screw for wear before installing a new nut, as worn screw threads will accelerate nut wear regardless of nut condition.