Southwire LNS250I Steel Sealing Locknut 2.5 in

Product Description

The SOUTHWIRE LNS250I is a steel sealing locknut designed for conduit and enclosure installations requiring a watertight or moisture-resistant mechanical connection. This fitting threads onto conduit hubs and knockout openings to secure conduit fittings while compressing an integrated sealing ring against the enclosure wall. Electricians use this locknut where codes call for a sealed entry point into wet-location panels, junction boxes, and other electrical enclosures. The 2.5-inch trade size suits larger conduit runs common in commercial and industrial distribution systems.

This sealing locknut is used in residential, commercial, and industrial electrical installations wherever conduit must enter an enclosure with a sealed, secure connection. Typical applications include wet locations, outdoor panels, and service entrance equipment where standard open locknuts do not meet code requirements. It is compatible with standard trade-size conduit and knockout openings.

Key Features

• Steel construction provides durability and mechanical strength in demanding installation environments
• Integrated sealing design compresses against the enclosure wall to restrict moisture ingress at the entry point
• 2.5-inch trade size fits standard knockouts and conduit hubs for larger-diameter conduit runs
• Threaded engagement secures conduit fittings firmly to panel and enclosure walls
• Suitable for wet-location and damp-location applications per applicable electrical codes

Compatibility

Designed as an OEM-style replacement and standard fitment for 2.5-inch trade-size conduit and knockout openings in electrical enclosures, panels, and junction boxes. Also referenced as Madison LNS-250-I and Topaz 717.

Installation Notes

Installation is typically performed by a licensed electrician in accordance with NEC requirements for conduit sealing at enclosure entries. De-energize all circuits and confirm the enclosure is fully powered down before beginning work. Thread the locknut onto the conduit fitting and tighten with a locknut wrench or spanner until the sealing ring seats firmly and evenly against the enclosure wall. Avoid overtightening, which can deform the sealing ring and reduce its effectiveness.

Technical Specifications

• Material: Steel
• Trade Size: 2.5 inches

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: LNS250I