Thomas & Betts 5712 1" Neopren...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,258.34
Thomas & Betts 5712 1" Neoprene Liquidtight Snap-In Knockout Plug, Pack of 100

Thomas & Betts 5712 1" Neoprene Liquidtight Snap-In Knockout Plug, Pack of 100

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Model: TB5712

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,258.34
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Thomas & Betts 5712 1" Neoprene Liquidtight Snap-In Knockout Plug

The Thomas & Betts 5712 is a 1" Neoprene snap-in knockout plug engineered to seal unused knockout openings in electrical boxes, conduit bodies, and enclosures. Built from flexible neoprene rubber, this liquidtight, snap-in knockout blank installs quickly without tools, snapping securely into the 1" knockout opening to close it off. Sealing unused knockouts helps keep moisture, dust, insects, and debris out of the enclosure interior, protecting wiring and connections inside. The 5712 is a straightforward, dependable accessory for electricians finishing out panelboards, junction boxes, and other electrical enclosures where a knockout was not used. This knockout plug is commonly specified alongside Thomas & Betts liquidtight fittings and conduit accessories for a consistent, code-compliant enclosure finish.

Key Features

  • Trade Size: 1" plug is sized to fit standard 1" knockout openings found on electrical boxes, enclosures, and conduit bodies.
  • Neoprene Construction: Molded from flexible neoprene rubber that resists weather, oil, and general wear, providing long-lasting performance in the field.
  • Liquidtight Snap-In Design: The snap-in profile allows fast, tool-free installation directly into the knockout opening while maintaining a liquidtight seal against moisture intrusion.
  • Knockout Blank Function: Closes off unused knockouts to keep the enclosure interior protected from dust, debris, pests, and moisture.
  • Low-Profile Fit: Sits flush with the enclosure surface once snapped into place for a clean, finished appearance.
  • Reusable Flexibility: The pliable neoprene material can be removed and reinstalled if a knockout needs to be reopened for future conduit runs.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Sealing Unused Knockouts in Electrical Boxes and Enclosures
  • Conduit Body and Panelboard Knockout Closures
  • Commercial and Industrial Electrical Installations
  • Outdoor and Damp-Location Electrical Enclosures
  • Renovation, Retrofit, and New Construction Electrical Work
  • Junction Box and Wireway Finishing

Why Thomas & Betts?

Thomas & Betts is a trusted name in electrical fittings, conduit accessories, and enclosure hardware, known for durable neoprene and liquidtight components built to withstand demanding job-site conditions. The 5712 knockout plug reflects that same commitment to dependable, code-ready performance, giving electricians a simple and reliable way to keep enclosures sealed and finished. Choosing Thomas & Betts for knockout closures and related conduit accessories means specifying a component built for consistent, long-term field performance.

Manufacturer Resources

Product Specs

list_batch:
TB-20260918
Product Type:
Knockout Plug
Department:
Electrical
Product Subgroup:
Enclosure Accessories
Product Size:
1"
Pack size (unit):
100
Product Group:
Boxes & Enclosures
Product Material:
Neoprene

Thomas & Betts TB5712 – Frequently Asked Questions

1) Can a neoprene snap-in knockout plug be used in a wet or damp location enclosure outdoors?
The 5712 is a liquidtight snap-in design, molded from neoprene that resists weather and oil, and it is used on outdoor and damp-location electrical enclosures. It seals against moisture, dust, insects, and debris once snapped in. For enclosures with a specific environmental rating you have to maintain, verify the closure method the enclosure manufacturer requires for that rating.
2) Do I need a tool or a locknut to install the 5712 knockout plug?
No tools and no hardware. The snap-in profile presses directly into the knockout opening by hand and holds itself there, unlike a steel blanking plug that needs a locknut or screw. That makes it fast when you are closing out a panel with several unused knockouts.
3) If I need to open that knockout later for a new conduit run, can the plug be removed and reused?
Yes. The neoprene body is pliable enough to pull out and reinstall, so a knockout you close today can be reopened for a future conduit run and plugged again if the run changes. A rigid metal blank is generally a one-way install by comparison.
4) Should I use a neoprene snap-in plug or a metal blanking plug for unused knockouts?
Pick based on what the opening has to do. The 5712 neoprene plug is the choice when you want a liquidtight seal, tool-free install, and the option to reopen the knockout later; it is what gets specified alongside liquidtight fittings on damp and wet-location work. A metal blank is the choice where the enclosure requires a metallic closure for grounding continuity or mechanical protection. On interior panelboards and junction boxes where you only need to keep dust, debris, and pests out, the neoprene plug does the job.
5) Does a rubber knockout plug sit flush, or will it stick out and interfere with a cover or adjacent equipment?
It is a low-profile plug that sits flush with the enclosure surface once snapped in, so it will not foul a flush cover or crowd gear mounted alongside the box.
6) What is the exact part number to order the 1 inch Thomas & Betts neoprene knockout plug?
Order Thomas & Betts part 5712 for the 1 inch neoprene liquidtight snap-in knockout plug. It is a single-model item, so there is no finish or option suffix to specify.
How fast can I get the Thomas & Betts TB5712 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Thomas & Betts TB5712 come with a warranty?
Absolutely. The Thomas & Betts TB5712 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Thomas & Betts TB5712?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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