Southwire LNS125 1.25 in Steel Sealing Locknut 25 Pack

Product Description

The SOUTHWIRE LNS125 is a 1-1/4-inch raintight sealing locknut designed to secure threaded conduits or connectors to electrical junction boxes and enclosures in wet or damp locations. Constructed from zinc electroplated steel, it delivers reliable corrosion protection where moisture exposure is a concern. The gasketed seating surface forms a watertight seal against the box face, keeping the interior protected. Licensed electricians and electrical contractors install these locknuts during conduit rough-in and finish work on exterior panels, weatherproof enclosures, and other wet-location installations. This listing includes a pack of 25 units.

This locknut is suited for residential and commercial electrical work wherever 1-1/4-inch threaded conduit or fittings terminate at a junction box or enclosure knockout. It allows standard junction boxes with unthreaded knockouts to be used in wet locations without requiring specialized wet-rated enclosures. Common applications include outdoor panel feeders, underground conduit entry points, and any conduit run exposed to rain or condensation.

Key Features

• Gasketed surface creates a watertight seal against the box or enclosure face in wet locations
• Zinc electroplated steel construction provides corrosion resistance in damp environments
• Fits 1-1/4-inch threaded conduit and threaded connectors
• Allows standard junction boxes with unthreaded knockouts to be used in wet-location conduit installations
• Sold in a 25-pack for efficient installation on multi-circuit jobs

Compatibility

Designed as an OEM-style replacement and standard fitment for 1-1/4-inch threaded conduit connectors and fittings at electrical junction boxes and enclosures. Also cross-referenced as Topaz 284 and Madison LNS-125.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements for wet-location conduit terminations. De-energize all circuits and verify power is off at the panel before working on any enclosure. Thread the locknut onto the conduit or connector and tighten until the gasket compresses evenly against the box surface to form a proper seal. Do not overtighten to the point of damaging the gasket, as this will compromise the watertight integrity.

Technical Specifications

• Conduit Size: 1-1/4 inches
• Material: Zinc electroplated steel
• Seal Type: Gasketed, watertight
• Location Rating: Wet and damp locations
• Pack Quantity: 25
• Length: 0.18 inches
• Height: 0.19 inches
• Width: 0.14 inches
• Weight: 0.05 pounds
• Country of Origin: United States
• Prop 65 Warning: Yes

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: LNS125