Metallics 300KOSS 3" 3 Piece K...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$146.76
$135.19
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Metallics 300KOSS 3" 3 Piece K/O Seal 417SS

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Model: 300KOSS

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

$146.76
$135.19
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3" 3 Piece K/O Seal 417SS

Manufacturer Resources

Product Specs

Division:
Electrical H1
Product Group:
Conduit Accessories
Sub Division:
Electrical-E H2
Department:
Electrical
Product Subgroup:
Plugs and Seals

Metallics 300KOSS – Frequently Asked Questions

1) What size knockout does the Metallics 300KOSS knockout seal fill?
The Metallics 300KOSS is sized for a 3 inch knockout opening in a panel, box, or enclosure wall. Order it where a 3 inch hole was punched and never used, or where conduit has been removed and the opening has to be closed back up.
2) Is the Metallics 300KOSS knockout seal a one-piece plug or does it come apart?
It is a three piece knockout seal, so the parts assemble through the hole and clamp from both sides of the sheet metal. That matters on a live or crowded panel where you cannot get behind the wall easily with a snap-in one-piece plug.
3) What is the difference between a knockout seal and a conduit plug for an unused panel opening?
A knockout seal like the 300KOSS closes a punched hole in the sheet metal wall of a box or enclosure, clamping against both faces. A conduit plug threads into the end of a raceway or into a threaded hub instead. If you are looking at a bare 3 inch hole in a panel, the seal is the part you want; if you are capping a threaded opening, use a plug.
4) Do I need anything else to install the Metallics 300KOSS 3 inch knockout seal?
No extra fittings. The 300KOSS ships as a complete three piece seal for a 3 inch knockout; you just need a screwdriver or wrench to draw the pieces together against the enclosure wall.
How fast can I get the Metallics 300KOSS 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 Metallics 300KOSS come with a warranty?
Absolutely. The Metallics 300KOSS 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 Metallics 300KOSS?
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 Metallics 300KOSS from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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