Bridgeport Fittings Knockout P...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1.16
Bridgeport Fittings Knockout Plugs - Zinc Plated Steel Electrical Enclosure Caps

Bridgeport Fittings Knockout Plugs - Zinc Plated Steel Electrical Enclosure Caps

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Model: 1691

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

$1.16
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Bridgeport Fittings Knockout Plugs - Zinc Plated Steel Electrical Enclosure Caps

Professional electrical enclosure protection and safety

Bridgeport Fittings Knockout Plugs provide reliable protection for unused knockout holes in electrical boxes and enclosures. These zinc plated steel plugs deliver long-term durability and corrosion resistance, ensuring electrical wiring remains safe from tampering and environmental elements while maintaining professional installation standards.

Professional Features & Benefits

  • Zinc Electro-Plate Finish: Provides superior corrosion resistance and extended service life in various environmental conditions
  • Steel Construction: Delivers robust durability for long-term knockout hole protection and reliable performance
  • Quick Installation Design: Enables fast, efficient installation by pressing or hammering into unused knockouts without special tools
  • Electrical Safety Protection: Keeps wiring systems secure from tampering and environmental damage while maintaining code compliance
  • Versatile Application: Compatible with standard knockout holes in electrical boxes and enclosures across multiple applications
  • Long-Term Performance: Steel body construction ensures knockout holes remain properly capped for extended periods

Technical Specifications

  • Country Of Origin: China
  • Department: Electrical
  • Division: Electrical H1
  • Easy And Quick Installation: Users can quickly install the knockout plug by pressing or hammering the plug into the unused knock
  • Field Application: Steel plug used to cap unused knockout holes in box or enclosure.
  • Npd Date Electrical: 2008-07-01T00:00:00.000Z
  • Prevent Electrical Damage: Keep electrical wiring safe from tampering and the elements with this knockout plug
  • Product Family: Electrical Supplies
  • Product Finish: Zinc electro-plate
  • Product Material: Steel
  • Steel Body: Operators can use this knockout plug to keep knockout holes capped for long periods of time
  • Sub Division: Electrical-E H2

Professional Applications

  • Electrical Panel Installations
  • Commercial Building Electrical Systems
  • Industrial Enclosure Protection
  • Residential Electrical Boxes
  • Maintenance and Retrofit Projects
  • Code Compliance Applications

Why Choose Bridgeport Fittings Quality?

Bridgeport Fittings delivers proven reliability through quality steel construction and zinc electro-plate finish, ensuring long-term protection and professional performance. These knockout plugs provide the durability and corrosion resistance needed for demanding electrical applications while maintaining ease of installation.

Manufacturer Resources

Product Specs

Department:
Electrical
Division:
Electrical H1
Product Finish:
Zinc electro-plate
Product Material:
Steel
Sub Division:
Electrical-E H2
Product Type:
Enclosure
Product Subgroup:
Enclosure Accessories
Product Group:
Boxes & Enclosures

Bridgeport Fittings 1691 – Frequently Asked Questions

1) What sizes do Bridgeport Fittings knockout plugs come in?
Six trade sizes: 1/2 inch (part 1691), 3/4 inch (1692), 1 inch (1693), 1-1/4 inch (1694), 1-1/2 inch (1695), and 2 inch (1696). Match the plug to the trade size of the knockout you are capping, not to the raw hole diameter you measure, since knockouts are called out by conduit trade size.
2) How do you install a Bridgeport steel knockout plug, and do you need a special tool?
No special tool. The plug is pressed or hammered into the unused knockout until it seats. That makes it a fast fix for an electrician closing out a panel or a maintenance tech walking a building, with nothing to thread and no locknut to chase on the back side.
3) Will a zinc plated steel knockout plug hold up in a damp or corrosive area?
The body is steel with a zinc electro-plate finish, which is the standard corrosion protection for indoor and general-purpose enclosure hardware. For a washdown, coastal, or chemical environment where you would otherwise be specifying stainless or a gasketed fitting, a plain zinc plated steel plug is the wrong call.
4) Why do I need to plug an unused knockout in a panel at all?
An open knockout leaves the enclosure interior exposed. Capping it keeps wiring safe from tampering and from the elements, and keeps the box closed the way an inspector expects to find it. Bridgeport's steel plug is made specifically to cap unused knockout holes in a box or enclosure, and it stays put long term rather than being a temporary cover.
5) Is a steel knockout plug better than a plastic snap-in plug for a commercial panel?
Steel is the choice where the plug has to survive handling, heat near a panel, and years in place. Bridgeport's plug is a steel body with zinc plating, intended to keep the hole capped for long periods. Plastic snap-in plugs are lighter duty and are usually reserved for residential boxes or temporary closure. If the enclosure is in an industrial space or a tenant-accessible area where tampering matters, go steel.
6) Can I use these plugs to cap knockouts in existing panels during a retrofit?
That is one of the main uses. On a retrofit or maintenance call where a circuit was pulled and the conduit removed, the plug drops into the vacated knockout and closes it. Because it installs by pressing or hammering, you can do it with the enclosure in place and no back-side access.
7) Do I need a locknut or washer with these Bridgeport knockout plugs?
No separate hardware. The plug is a one-piece press-in or hammer-in part, so nothing else has to be ordered to close the hole. Order by the trade size of the knockout, from 1/2 inch up to 2 inch.
8) I have a mix of knockout sizes across a building's panels. Which plugs should I stock?
For a general MRO kit, 1/2 and 3/4 inch cover most branch circuit knockouts, with 1 inch and 1-1/4 inch showing up on feeder and larger panel entries. Bridgeport covers all of them in one family, 1691 through 1696, so the whole range is the same steel body and zinc plated finish and looks consistent across every enclosure in the building.
How fast can I get the Bridgeport Fittings 1691 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 Bridgeport Fittings 1691 come with a warranty?
Absolutely. The Bridgeport Fittings 1691 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 Bridgeport Fittings 1691?
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
Why buy the Bridgeport Fittings 1691 from ZenSupply?
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