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The KEYSTONE THREADED PRODUCTS US012AG1A001850 is a heavy-duty hex nut designed for use with 3/4-6 Acme threaded fastener assemblies. Machined from Grade 303 stainless steel, this nut delivers solid corrosion resistance and reliable holding strength in demanding mechanical and industrial applications. The 2G thread fit class provides a standard commercial tolerance suitable for most power transmission and linear motion assemblies. With a width across flats of 1.25 inches and a height of approximately 0.734 inches, it is sized for use with a standard 1-1/4 inch wrench or socket. Installation requires no special tooling beyond common hand tools.
This hex nut is suited for Acme-threaded lead screw assemblies, linear actuators, machine tool components, and structural fastening applications where stainless steel is specified for corrosion resistance or cleanliness requirements. The right-hand thread direction follows standard convention, making it straightforward to integrate into existing assemblies. It is commonly installed by millwrights, maintenance mechanics, and industrial tradespeople working on equipment with Acme thread profiles.
Designed as an OEM-style replacement or service hex nut for assemblies using 3/4-6 Acme threaded rods or lead screws with a 2G fit class tolerance.
Installation is performed by millwrights, maintenance mechanics, or industrial technicians. De-energize and lock out all equipment before servicing any threaded fastener assembly. Apply appropriate thread lubricant or anti-seize compound if required by the application environment. Torque to the value specified by the equipment manufacturer for this thread size and material grade.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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