Square D 9001SK40 Pushbutton Switch Ring Nut

Product Description

The SQUARE D 9001SK40 is a replacement ring nut designed for securing pushbutton operator heads to control station enclosures. Constructed from aluminum and zinc, this ring nut provides a durable, corrosion-resistant hold on 30 mm pushbutton assemblies. It measures 4.5 inches in length, 2.4 inches in width, and 2 inches in height, and weighs approximately 0.03 pounds. Electricians and industrial maintenance technicians install this hardware during pushbutton replacement, control panel assembly, or scheduled maintenance on operator interface stations.

This ring nut is suited for use in industrial control panels, machine control stations, and operator interface enclosures where 30 mm Harmony series pushbuttons are installed. It fits a range of Harmony pushbutton operator types and is appropriate for both new installations and field replacements in manufacturing, processing, and utilities environments.

Key Features

• Aluminum and zinc construction for durability and corrosion resistance
• Sized for 30 mm Harmony series pushbutton operators
• Compact form factor: 4.5 inches x 2.4 inches x 2 inches
• Lightweight at 0.03 pounds — minimal added mass to panel assembly
• Sold individually — single-unit packaging for targeted replacement needs

Compatibility

Designed for use with Harmony 9001K, 9001SK, and 9001KX 30 mm pushbuttons, as well as SKR3, SKRU1, SKRU10, SKRU2, SKRU3, SKRU4, SKRU5, and SKRU2 pushbutton operators.

Installation Notes

Installation is performed by a licensed electrician or qualified industrial maintenance technician. De-energize and lock out the control panel per NFPA 70E and applicable OSHA lockout/tagout procedures before beginning work. Thread the ring nut onto the pushbutton operator body by hand and tighten with an appropriate spanner or panel nut wrench to secure the operator head to the enclosure knockout. Do not overtighten, as this may crack the operator body or strip the threads.