Locknuts are also known as a lock nut, locking nut, prevailing torque nut, stiff nut, or elastic stop nut. It is a nut that resists loosening under vibrations and torque. Elastic stop nuts and prevailing torque nuts are of the particular type where some portion of the nut deforms elastically to provide a locking action.

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Die Cast
Die-Cast Locknuts are conduit locknuts that are for securing threaded conduit or connectors with tapered or straight thread to a knockout or unthreaded slip hole. They are made of a zinc die-cast. They are UL and CSA listed.

Grounding Malleable
Grounding Malleable Locknuts are constructed of steel with a zinc finish for added strength. It is designed for use with rigid/IMC conduit. The locknut is UL listed with a threaded X screw connection.

Non-Metallic Locknuts are used for strain relief and have a non-metallic finish. They have a low profile and they are the style of cord connectors. Non-Metallic Locknuts are conduit accessories that are used for conduit fittings.

Sealing Locknuts are designed for use with raintight, watertight and other oiltight enclosures. They are UL listed raintight and liquidtight. They provide economies in installation and fitting costs. Sealing locknuts also provide positive ground connection and they functionally replace rigid threaded enclosure connectors.

Steel Locknuts ensure a secure hold and reduce slippage. They plain steel fasteners are suitable where strength and value are the primary considerations. The coarse threads are better for brittle materials and will assemble and disassemble more quickly than fine threads.