Nsi Industries 280 Emt to Fmc Transition Coupling 3/8 to 1/2

Product Description

The NSI INDUSTRIES 280 is a combination transition coupling designed to connect 1/2-inch EMT to 3/8-inch flexible metal conduit (FMC) in a single fitting. The compression end grips the EMT securely without the need for additional fasteners, while a two-screw steel strap locks the FMC in place. The body is cast from malleable iron, which provides the tensile strength required for conduit fittings in commercial and residential electrical installations. This coupling is sold in a box of 25 units, making it practical for projects requiring multiple transitions. Licensed electricians and electrical contractors are the primary installers of this fitting.

This coupling is suited for use in standard electrical conduit installations where a rigid EMT run must transition to flexible metal conduit, typically at motor terminations, equipment connections, or other points requiring vibration isolation or repositioning flexibility. It is appropriate for both residential and light commercial applications where EMT and FMC are permitted by the applicable electrical code. The box quantity of 25 supports production wiring work or service calls where multiple transitions are needed.

Key Features

• Connects 1/2-inch EMT to 3/8-inch FMC in a single combination fitting
• Compression end secures EMT without additional fasteners
• Two-screw steel strap firmly clamps the flexible metal conduit
• Malleable iron body for high tensile strength and durability
• Sold in a box of 25 units for volume installation work

Compatibility

Designed for use with 1/2-inch EMT conduit on the compression end and 3/8-inch flexible metal conduit on the strap end, consistent with standard EMT-to-FMC transition applications in NEC-compliant wiring installations.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize the circuit and verify the absence of voltage before making any conduit connections. Seat the EMT fully into the compression end before tightening, and ensure both screws on the steel strap are tightened evenly to secure the FMC without deforming the conduit jacket.

Technical Specifications

• EMT Trade Size: 1/2 inch
• FMC Trade Size: 3/8 inch
• Body Material: Malleable Iron
• Strap Material: Steel
• Quantity per Box: 25

Standard Information

• Brand: NSI INDUSTRIES
• Manufacturer Part Number: 280