Appleton 337-R Reducing Bushing 2-1/2 X 1-1/2 Inch

Product Description

The APPLETON 337-R is a threaded reducing bushing used to adapt a larger conduit trade size opening down to a smaller conduit trade size. This fitting transitions a 2-1/2 inch female threaded opening to a 1-1/2 inch male thread, allowing an electrician to reduce a knockout, enclosure hub, or coupling without additional fittings. It is a standard conduit accessory found in panelboards, junction boxes, conduit bodies, and enclosures across residential, commercial, and industrial electrical installations. The compact profile keeps the fitting flush within the entry point and maintains a secure threaded connection on both ends.

This reducing bushing is suited for use in standard conduit systems wherever a trade size reduction is needed at a box entry, enclosure knockout, or conduit run junction. It is a common stock item for electrical contractors managing mixed conduit sizes across a single enclosure or panel. The 337-R is typically installed during rough-in or panel work when conduit layout requires stepping down from 2-1/2 inch to 1-1/2 inch trade size at a termination point.

Key Features

• Reduces 2-1/2 inch female thread to 1-1/2 inch male thread in a single fitting
• Threaded design provides a secure, vibration-resistant connection
• Compact dimensions allow installation in tight enclosure knockouts
• Lightweight at 1.06 pounds for easy handling during installation

Compatibility

Designed as an OEM-style replacement or standard-stock conduit reducing bushing compatible with 2-1/2 inch threaded conduit entries stepping down to 1-1/2 inch trade size on standard electrical enclosures, conduit bodies, and junction boxes.

Installation Notes

Installation is performed by licensed electricians in accordance with NEC requirements for conduit fittings and enclosure entries. De-energize and lock out the panel or enclosure before beginning any conduit work. Thread the male end into the conduit or fitting by hand, then tighten with the appropriate strap wrench or conduit fitting tool to ensure a snug, secure fit. Do not over-tighten, as this may damage the threads on the enclosure or fitting.

Technical Specifications

• Inlet Trade Size: 2-1/2 inches (female thread)
• Outlet Trade Size: 1-1/2 inches (male thread)
• Weight: 1.06 pounds
• Package Dimensions (L x W x H): 5.6 x 5.2 x 0.72 inches
• UPC: 78312678581

Standard Information

• Brand: APPLETON
• Manufacturer Part Number: 337-R