Keystone Threaded Products UM010AG1F001550 Hex Nut

Product Description

The KEYSTONE THREADED PRODUCTS UM010AG1F001550 is a left-hand thread hex nut manufactured from 1215 and 12L14 free-machining steel. It carries a 5/8-6 Acme thread form with a 2G fit class, making it suitable for precision linear motion assemblies and power transmission applications. The 1-1/16 inch across-flats dimension accepts a standard open-end or box wrench. At 0.119 pounds, the nut is a compact fastener intended for use wherever a left-hand thread is required to resist loosening under counter-clockwise rotational loads or to meet specific mechanical design requirements. Licensed mechanics, millwrights, and maintenance technicians are the typical installers.

This hex nut is used in industrial machinery, lead screw assemblies, actuators, and mechanical systems that specify Acme thread profiles for load-bearing or positioning functions. The left-hand thread direction is critical and must be matched to a corresponding left-hand threaded rod or lead screw. The 2G fit class indicates a general-purpose commercial tolerance suitable for the majority of power transmission and positioning applications. It is not rated to meet military specifications.

Key Features

• Left-hand Acme thread direction for counter-clockwise drive applications
• 5/8-6 Acme thread size with 2G commercial fit class
• 1215 and 12L14 free-machining steel construction for consistent threading quality
• 1-1/16 inch width across flats for standard wrench compatibility
• 39/64 inch height for compact axial footprint in tight assemblies
• Does not meet military specifications - commercial grade application

Compatibility

Designed for use with 5/8-6 Acme left-hand threaded rods and lead screws requiring a 2G fit class in industrial and mechanical power transmission assemblies.

Installation Notes

Installation should be performed by a qualified millwright, machinist, or maintenance technician familiar with Acme thread systems. Confirm the mating threaded component is also a left-hand thread before assembly - cross-threading a left-hand nut onto a right-hand lead screw will damage both parts. Use the appropriate wrench size across the 1-1/16 inch flats and do not apply excessive torque beyond what the assembly design specifies. Degrease mating surfaces if thread-locking compound or lubrication is called for in the equipment service documentation.