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Black nylon cord connector locknut, 3/8 inch NPT thread, low-profile hexagonal shape

Hubbell Incorporated

Hubbell Incorporated 31622002L Cord Connector Locknut Nylon 3/8 in Black

SKU CH-QFXZ-3QACP

Nylon locknut secures 3/8 in threaded metallic conduit with liquid-tight seal, CSA certified and UL listed

  • TypeCable Management & Conduit
  • ColorBlack
  • Low-profile design fits tight enclosures with 1 1/8 in overall length
  • Nylon construction resists corrosion and impact in harsh environments
  • Liquid-tight seal protects wiring from moisture and contaminants
  • UL Listed and CSA Certified for code-compliant installations
  • Operates reliably from -22 Degrees F to 105 Degrees F

Hubbell 3/8" NPT Nylon Locknut

This black nylon locknut fits a 3/8 inch NPT hub and secures threaded metallic conduit in cord connector assemblies. It is UL Listed and CSA Certified for liquid-tight installations. The part suits electricians and maintenance crews who need a low-profile fastening solution for 3/8 inch trade-size conduit runs.

Temperature rating and liquid-tight seal

The locknut operates continuously from -22 °F to 105 °F without losing its sealing properties. Nylon construction resists corrosion and vibration while maintaining a liquid-tight joint on threaded metallic conduit. Under sustained thermal cycling the material retains dimensional stability and keeps the connection secure.

Hand-tight installation on 3/8" conduit

Thread the locknut onto the connector by hand and finish with a wrench for a snug fit; the 0.265 inch thickness and 1 1/8 inch overall length leave enough thread engagement for standard 3/8 inch NPT hubs. Over-tightening can strip the nylon threads, so apply only enough torque to compress the sealing ring. The low-profile design eases access in tight enclosures but offers no flange for additional leverage.

Highlights

  • Low-profile design fits tight enclosures with 1 1/8 in overall length
  • Nylon construction resists corrosion and impact in harsh environments
  • Liquid-tight seal protects wiring from moisture and contaminants
  • UL Listed and CSA Certified for code-compliant installations
  • Operates reliably from -22 Degrees F to 105 Degrees F

Specifications

BrandHUBBELL WIRING DEVICE-KELLEMS
TypeCable Management & Conduit
ColorBlack

Questions about this item

Does the nylon locknut handle the 105 °F max operating temperature without softening during continuous use?

Yes, the nylon material is rated for a maximum operating temperature of 105 °F, so it remains stable during all-day service.

Must the conduit already have 3/8 in NPT threads for this locknut to engage?

Yes, it requires a threaded metallic conduit with a 3/8 in NPT thread size to install correctly.

Will the 0.265 in thickness fit inside standard 3/8 in conduit bodies without binding?

The locknut thickness is 0.265 in and is designed for standard 3/8 in threaded metallic conduit bodies.

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