Electrical locknut · 1-1/2 in - For Securing Threaded Conduit and Fittings - LK1.5

What this product is for

This 1-1/2 in trade size electrical locknut is used to secure a threaded conduit fitting or connector to a box, enclosure, or knockout opening. It is typically selected where a simple locknut is needed to hold the fitting tight from inside the enclosure.

Use for

Use for panelboards, junction boxes, pull boxes, cabinets, and other enclosures where a 1-1/2 in threaded fitting passes through a knockout. Common applications include rigid metal conduit (RMC) and intermediate metal conduit (IMC) fittings, subject to the fitting thread and listing.

Avoid for

Avoid using this item where a bonding locknut, insulated throat, sealing fitting, or corrosion-resistant material is specifically required. Do not assume grounding or bonding performance unless the product listing confirms it.

Best for

Best for standard electrical fitting make-up where the installer needs a straightforward locknut in a 1-1/2 in trade size. Suitable for commercial, industrial, and service work when matched to the fitting and enclosure.

Installed in

Installed inside steel or aluminium boxes, cabinets, wireways, and enclosures after the threaded fitting is inserted through the knockout. The nominal trade size is 1-1/2 in, approximately 38 mm.

Why this product exists

Locknuts are used to mechanically secure threaded conduit fittings to an enclosure so the connection stays tight during installation and service. Serrated locknuts are commonly used in the trade to help bite into the box surface and resist loosening, but actual design varies by manufacturer.

Compared with similar products

Compared with a bonding locknut, a standard locknut is the simpler choice when additional bonding features are not required. Compared with an insulated bushing or insulated throat connector, a locknut does not provide conductor edge protection. For wet, corrosive, or washdown locations, material and finish selection matter more than trade size alone.

Specifications

• Product type: Electrical locknut
• Trade size: 1-1/2 in (approximately 38 mm)
• Intended use: Secure threaded conduit fittings and connectors to boxes and enclosures
• Typical applications: RMC and IMC fitting installations, depending on fitting compatibility
• Installation location: Inside box or enclosure at knockout opening
• Material and finish: Not verified for LK1.5
• Certification: Not verified for LK1.5
• Brand used: Electrical Fittings, based on legacy row data
• Part number: LK1.5

Buying note: For 1-1/2 in conduit systems, confirm whether you need a standard locknut, bonding locknut, or insulated fitting accessory before ordering. Actual suitability depends on fitting type, enclosure material, environment, and local electrical code.