Keystone Threaded Products NQ012AC1F003145 Precision Acme Nut

Product Description

The KEYSTONE THREADED PRODUCTS NQ012AC1F003145 is a left-hand, round precision Acme nut machined from bronze. It carries a 3/4 inch - 5 Acme thread at a 2C class of fit, giving it the controlled clearance needed for power transmission and linear motion applications where back-driving or deliberate reverse travel is required. The overall diameter is 1.12 inches, the nut stands 1.25 inches high, and the thread engagement length is 0.50 inches. The part weighs 0.281 pounds. Machinists, maintenance technicians, and OEM assembly teams working with precision lead-screw assemblies are the typical installers of this component.

This Acme nut is suited for use in linear actuators, jigs, fixtures, vises, and other power-screw assemblies where a left-hand thread direction is specified. The left-hand orientation is a design requirement in applications that must resist loosening under counterclockwise rotation or that are paired with a right-hand nut on a dual-drive screw. Bronze construction provides inherent lubricity and corrosion resistance, making it appropriate for both dry-run and lightly lubricated environments common in industrial machinery and shop equipment.

Key Features

• Left-hand thread direction for reverse-travel or anti-loosening drive applications
• 3/4 inch - 5 Acme thread profile with 2C class of fit for controlled clearance
• Bronze material provides self-lubricating properties and corrosion resistance
• Round external profile with 1.12 inches overall diameter for standard bore or flange mounting
• Single thread start for straightforward linear positioning
• Manufactured under ISO 9001:2019 quality management standards

Compatibility

Designed for use with 3/4 inch - 5 left-hand Acme threaded lead screws requiring a 2C class of fit. Verify thread direction and fit class against the mating screw specification before ordering.

Installation Notes

Installation is typically performed by machinists or mechanical maintenance technicians during assembly or lead-screw replacement. Confirm the mating screw carries a matching left-hand 3/4 inch - 5 Acme thread before assembly. Clean the screw and nut threads of debris and apply an appropriate lubricant unless the application specifies dry running. Do not force-thread the nut onto the screw; resistance during hand-threading indicates a thread mismatch or contamination that must be resolved before proceeding.