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Black nylon flush-mount twist-lock receptacle with three screw terminals

Hubbell Incorporated

Hubbell Incorporated HBL7310B 20A Twist-Lock Receptacle 3P 3W 125/250VAC BK

SKU CH-3GGD-ESKDW

A 20 A twist-lock receptacle with three poles and three wires rated for 125/250 V AC

  • Product type3 Pole 3 Wire
  • Product colorBlack
  • 20 A current rating supports demanding 125/250 V AC loads
  • Three-pole, three-wire design handles single-phase power safely
  • Black nylon housing resists impact and heat in tough environments
  • Flush-mount style fits standard boxes for clean installation
  • Screw-terminal wiring ensures secure, maintenance-friendly connections

20 A Twist-Lock Receptacle

The Hubbell HBL7310B is a 20 A twist-lock receptacle rated for 125/250 V AC single-phase power. It uses a 3-pole, 3-wire configuration with screw-terminal connections. The black nylon housing is non-flanged for flush mounting and carries a NEMA enclosure rating of 1. It is built for industrial and commercial equipment requiring a secure locking connection.

Capacity and headroom

The device handles continuous loads up to 20 A at either 125 V or 250 V AC. Brass contacts and a polarized design maintain reliable contact under vibration or movement. It is not suited for circuits exceeding 20 A or for three-phase installations that demand a fourth wire. The single-gang format limits it to one receptacle per opening.

Practical limits of the locking interface

The twist-lock mechanism prevents accidental disconnection but requires manual engagement and release. The non-NEMA configuration means mating plugs must match the exact 3P3W pattern; standard NEMA locking plugs will not fit. No cover is included, so the face remains exposed when not in use. AFCI protection is not integrated and must be provided upstream if required.

How it compares

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

Price $34.99
Cheaper than about 56% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameHubbell Wiring Device-Kellems
Model nameHBL7310B
Product type3 Pole 3 Wire
Product colorBlack

Questions about this item

Will this 20 A twist-lock receptacle fit alongside my existing 125/250 V AC wiring?

Yes, it is rated 20 A at 125/250 V AC with three poles and three wires, matching standard single-phase supplies.

How can I confirm the HBL7310B is wired correctly after installation?

Verify that each of the three brass screw terminals is tight, the receptacle sits flush in the box, and a twist-lock plug locks securely without play.

What comes with the HBL7310B and what must I purchase separately?

The receptacle itself is supplied; you will need a compatible twist-lock plug, mounting box, cover plate and wire connectors to complete the installation.

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