Bridgeport Fittings 143 Steel Sealing Locknut 1 Inch

Product Description

The BRIDGEPORT FITTINGS 143 is a 1-inch steel sealing locknut designed to create a raintight seal when fastening threaded conduit to an unthreaded opening in a box or enclosure. The locknut features an integrated PVC seal that compresses against the enclosure surface during installation, blocking moisture intrusion at the entry point. The steel body carries a zinc finish for corrosion resistance, and the yellow color aids visual identification during inspection. This fitting is specified for raintight electrical conduit installations where weather-exposed or damp-location enclosures require a secure, sealed conduit termination.

This locknut is used in residential and commercial electrical installations wherever conduit must terminate at a box, panel, or enclosure with an unthreaded knockout. Typical applications include outdoor electrical enclosures, service entrance installations, wet-location junction boxes, and any conduit run requiring a raintight connection at the enclosure wall. The 1-inch trade size accommodates standard 1-inch threaded conduit. It is installed by licensed electricians working with rigid metal conduit or intermediate metal conduit systems in raintight applications.

Key Features

• Integrated PVC seal provides raintight performance at conduit-to-enclosure connections
• Steel body with zinc finish for durability and corrosion resistance
• 1-inch trade size fits standard 1-inch threaded conduit
• Designed for unthreaded knockouts in boxes and enclosures
• Yellow color for easy visual identification during inspection

Compatibility

Designed as an OEM-style raintight locknut for use with 1-inch threaded conduit terminating at unthreaded openings in standard electrical boxes and enclosures.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements for raintight fittings at wet or damp locations. De-energize all circuits before working in or around any enclosure. Thread the conduit into the fitting, then thread the locknut onto the conduit and tighten against the enclosure wall until the PVC seal compresses evenly and a raintight connection is achieved. Do not overtighten to the point of deforming the PVC seal.

Technical Specifications

• Material: Steel
• Finish: Zinc
• Color: Yellow
• Trade Size: 1 inch
• Type: Sealing Locknut
• UPC: 781747001436

Standard Information

• Brand: BRIDGEPORT FITTINGS
• Manufacturer Part Number: 143