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Black ribbed nylon locking plug with clear funnel wire entry and integral dust shield

Hubbell Incorporated

Hubbell Incorporated HBL2321BK Locking Plug L6-20P 20A 250V AC Black

SKU CH-79PJ-6KQWX

A 20 A 250 V AC locking plug with ribbed nylon housing, screw terminals and integral dust shield for heavy-duty use

  • Product typePlug
  • Product colorBlack
  • Rated for 20 A and 250 V AC single-phase operation
  • Ribbed nylon housing provides impact and chemical resistance
  • Cord grip design reduces strain on terminations
  • Funnel-shaped wire entry simplifies termination work
  • Integral dust shield helps keep contaminants out

Hubbell HBL2321BK Locking Plug L6-20P

The Hubbell HBL2321BK is a NEMA L6-20P locking plug rated for 20 A and 250 V AC single-phase operation. It features a ribbed black nylon housing that provides impact and chemical resistance for extra heavy-duty applications. The plug accepts cord diameters from .360" to .930" and uses screw terminals with a clear funnel-shaped wire entry. An integral dust shield helps prevent contaminants from entering the wiring chamber.

Suited for 20 A 250 V equipment connections

This plug suits installers wiring 20 A 250 V equipment in industrial or commercial environments where a secure locking connection is required. The operating temperature range extends from -40 °C to +75 °C for continuous use. Builders needing a different NEMA configuration, a lower amperage rating, or a voltage other than 250 V AC should select an alternative device.

NEMA L6-20P configuration decides fit

The single specification that decides compatibility is the NEMA L6-20P configuration, which defines a 2-pole 3-wire grounding arrangement for 250 V service. The housing meets HB or better flammability rating per UL 94 or CSA standards. Verify that the mating receptacle and circuit match this exact configuration before installation.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 71% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameHubbell Wiring Device-Kellems
Model nameHBL2321BK
Product typePlug
Product colorBlack

Questions about this item

How do I wire the L6-20P plug and which step is most often done incorrectly?

Strip each conductor to the length shown on the funnel entry, insert fully into the screw terminals, and tighten to the specified torque; the step most often missed is torquing the terminal screws after the cord-grip is secured.

What maintenance or replacement will this locking plug need over time?

Inspect the ribbed nylon housing for cracks or discoloration, verify the dust shield remains seated, and re-torque the screw terminals periodically; replace the plug if the housing shows heat damage or the cord grip no longer clamps the .360 to .930 inch cord range.

What is the first limit reached when this plug runs at full 20 A load continuously?

The 75 °C maximum continuous operating temperature is the first limit; the HB-rated nylon housing and integral dust shield are designed to contain heat up to that point, so sustained 20 A use must not push the wiring chamber above 75 °C.

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